Synthetic Post #1: Riparian Zones as the Keystone of the River

I never took Latin as a child, I took Spanish. So the first time Dr. Lookingbill used the words “Riparian Zones” I had no idea what he was talking about. For a few minutes I was completely dumbfounded about this new topic I had no prior knowledge for. I had no idea how important they are to the health of the water shed. I had no idea how much a place can be defined by what happened historically in that riparian zone. Now halfway through the semester I know that the word “riparian” is from the Latin word “ripa” which means river bank. Now I realize the great importance of the riparian zones and how they are the core of the health of the river. Now I know that it is important to focus on improving the health of the riparian zone to improve the well being of the entire river. The James River Association has three main components they focus on to improve water shed quality. This organize has decided to put all of their time and money into only three things; storm water runoff, invasive species removal and riparian zones. This focus shows how important this one place is for the healthy of the entire river. Although I did not know much about them at the start of the semester, I know understand just how important riparian zones actually are.

At their core, healthy riparian zones help protect and stabilize aquatic habitats. The roots of the trees in these zones help hold in the soil and stabilize river banks. This prevents erosion and reduces the sentiment entering the water. Leaf canopy also acts as a natural umbrella, shading the river and cooling it down. The presence of shade spots and some sun spots are advantageous for fish populations, due to ectotherms wanting to change their metabolism rate based on current conditions. Now they can move freely to different temperatures. Another benefit of riparian zones is that the the soil helps filter the water entering the stream. Through both groundwater and overland flow, the water is slowed down and detrimental compounds are filtered out. Flash flooding is also reduced as the water is slowed down an time between rainfall and peak water levels is increased. The importance of riparian zones for controlling erosion has been recognized with studies from the HJ Andrews experimental forest we visited, where now loggers are no longer allowed to cut trees to the edge of streams and must leave a buffer to not destroy the river’s delicate natural processes.

Riparian zones are also important hotspots of terrestrial biodiversity. A wide range of flora and fauna inhabit riparian zones. Many different tree species are found only in riparian zones and nowhere else. Some examples of these which can be found on campus are the Black Willow, River Birch and Sycamore trees. Everyone in this class should be already familiar with identifying these species, but I hope that we as students can understand their importance of contributing to riparian zones. Macro fauna like birds and mammals use these long corridors as safety highways, protected from predators and always having close access to food.  Without riparian zones a wide range of an important species will suffer.

Ann Woodlief tells us repeatedly how these riparian zones are almost a historical oasis in her book In River Time. Humans have always been attracted to live near riparian zones since early history. Along the James river, the Native Americans were the first to make use of this rich resource. They were drawn to the high concentration of wildlife, and plant based foods as well as the more moderate temperatures. European settlers were also attracted to building cities in  riparian zones, but this time with the access to trade routes as a primary concern. With most of early human history occurring in riparian zones, it truly is important to realize the historical significance of these special places.

Portland waterfront, not the harsh bank blocking natural processes.

Portland waterfront, not the harsh bank blocking natural processes.

Downtown Richmond’s riparian zones directly contrast those I found in downtown Portland on our class trip. Richmond’s downtown is mostly characterized by the James River Parks system that controls the land next to the river. This land is kept natural and is made into public parks with very little artificial banks. While reading Portlandness, I was struck with how environmentally conscious Portland was as a city. It initially appeared to me that this was a city that knew what was needed to protect their own watershed. They knew what was the best for the environment and implemented those plans. A perfect model for others to follow. This view was shattered when we visited Portland and I was able to see their hard river flow control. There was a total lack of riparian zones and abundance channel bank infrastructure wherever I looked. The discarding of riparian zones and creation of artificial banks can have negative long term consequences for their entire region. This changed my view of Portland as a city from an romanticized phantom of perfection to something much more pessimistic.

Richmond riverfront, note green space and parks along river.

Richmond riverfront, note green space and parks along river.

There are countless downsides to the approach that Portland took to develop their river banks. The largest and most noticeable is the concept of hydrologic drought. Michael describes hydrologic drought by declaring that the end result of the process is “a huge portion of the invaluable function played by riparian zones as buffer systems is lost”. This process is fairly complex, but starts with the lowering of the water table. The hard concrete banks do not allow as much water from the steam to enter the groundwater. These initially saturated soils then go through a major ecological reversal event. As the water leaves, oxygen freely flows in. This completely changes what microorganisms live in the soil, as anaerobic organisms cannot function in these new aerobic conditions. The result of this is the nitrogen fixation previously occurring is stopped, and instead an increase of nitrogen is given back to the atmosphere, instead of being processed into natural compounds. This is a significant imbalance and the quick change can increase algal blooms and even create dead zones in the water, where the algae uses up all the oxygen present. Native fishes cannot live in this low oxygen environment and die away.  Not only do hard banks in Portland create negative effects, but natural banks have their own category of positive effects. Natural banks with dynamic small scale erosion are hotspots of bio diversity.  Each and every scale of organism from large mammals to small bacteria can find a place to live on the bank. Hard concrete banks do not allow for this wide range of habitat. That sediment from small scale erosion then flows downstream, and creates habitats for different organisms. The changing nature of erosion also modulates the flow of the river, and allows it to move freely within larger boundaries. All of these benefits are essential to the health of the river, and it is hard to see how Portland can call itself a green city when lacking all of these normal biological processes.

Hydrologic drought.

Hydrologic drought.

Focusing on improving urban riparian zones are the best way to improve the health of any river. Urban regions are where most of the pollution enters a river and many cities lack  riparian zones to help filter it out. Riparian zones not only improve the health of the organisms in the river as well as on land. They are truly a valuable resource with immense ecological value.  Richmond as a city seems to be doing well on maintaining its healthy natural banks that form its riparian zone. On the other hand, Portland seems to not care about the health of their water shed, because they build hard artificial banks to define the river’s boundaries. Banks like these will have long term negative effects on society, that will end up costing more to fix than if then if the city left bank natural. Riparian zones form the foundation of any ecosystem, and protecting them is of the upmost importance.

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Deconstructing the River

As I sat on a tumbled log in the heart of the Old Growth Forest, I heard nothing but the water.  Even the birds were silent; I had never experienced such peace.  We left no trace as we completed our reflections in the quiet, essentially undisturbed forest.  We later braced ourselves for the glacial waters of the McKenzie River where everything was natural except the floating yellow and blue rafts.  Although there was some sign of human interaction with nature, the landscape was still preserved, unlike the James River.  We take advantage of our urbanized river through construction and should make efforts to minimize our human impact on the once pristine environment.

The Old Growth Forest

The Old Growth Forest

What does it mean to be an urbanized river?  According to Walsh and collaborators, bodies of water in cities suffer from “urban stream syndrome” which causes “flashy” hydrographs and other “symptoms” such as decreased organic matter retention, escalation of overland flow, and lowered rates of nutrient uptake (Walsh 2005).  The James River shows signs of this condition and there is a chance we could treat it, but first we must acknowledge that the wilderness is in our own backyard.  The problem humans have is we generally define the wilderness as a “sublime” environment separate from our homes and workplaces.  Cronon explains that the wilderness is all around us and we need to accept this idea so we can more effectively protect our surroundings from the “urban stream syndrome” (Cronon 1995).

Construction has a severe impact on our local waterways, especially by means of bridges, dams, and mining.  On the James River near the Huguenot Flatwater access there are the Huguenot and Willey bridges which create a primarily aesthetic disturbance to the landscape.  However, the structures also escalate the flow of traffic to the area, thus increasing human impacts on the water.  There are similar effects on the Willamette River due to the rise in population and construction in Portland, Oregon.  In my journal on the trip, I note several instances of cranes, bridges, and tall buildings creating disruptions in the landscape along our paddle along the river (Lantz Journal).

The Willamette River in Portland, Oregon

The Willamette River in Portland, Oregon

Furthermore, dams have a more direct effect on the hydrology of streams.  We paddled to Bosher Dam to take a closer look at the fish ladder that is operational during only three months of the year.  Ironically, the dam serves no purpose other than to appease wealthy homeowners who enjoy the flatwater the dam creates.  It was originally built to redirect water for the construction of the Kanawha Canal and is now a barrier for fish migrating during mating seasons.  Before the dam, fish were able to travel as far as Lynchburg on the James River and the fish ladder is in place to make this easier for fish from March to early June (LantzBlogPost 10/16/16, EgnerBlogPost 10/15/16).  Unlike the Bosher Dam, the Bonneville Dam in Cascade Locks, Oregon was built by the United States Army Corps of Engineers to produce energy for the surrounding area.  There is also a fish ladder in place and at least 97 percent of the population must be able travel safely in order for the dam to remain operational and employees are constantly monitoring the fish species leading to early recognition of environmental concerns (Lantz Journal).  The Bonneville Dam succeeds in reducing human impacts on the local environment and attempting to use the resources of the area without severely damaging the ecosystem.

Bonneville Dam in Cascade Locks, Oregon

Bonneville Dam in Cascade Locks, Oregon

Mining is yet another cause of disturbances in urban landscapes.  The quarry in Belle Isle is a famous example in the Richmond area; companies used to mine granite from the ground, thus creating the feature seen today.  The mining played a strong role in affecting the hydrology of the local ecosystem as the large hole has now filled with water, generating another drainage area.  We visualized a similar concept on our paddle to Ross Island in Oregon, except workers mined gravel instead of granite.  A company was granted access to the land for several years to mine, but the island has been left in shambles.  The land is a nightmare for the next owner and there is an ongoing debate as to who will be responsible for cleaning it up.  Humans have a history of having selfish, economic-driven goals in mind and nature is not often the first priority when it comes to construction projects.

The McKenzie River in Oregon

The McKenzie River in Oregon

Rivers are the heart of many cities around the world, especially Richmond and Portland.  Many kayakers, white water rafters, and fishermen call the river home, the James River is celebrated by Richmonders at the Folk Festival each year, and others simply find the river peaceful.  It is important for people to enjoy the river, but the preservation of the waterways is necessary to sustain the river for humans to continue using its resources.  In Oregon, we saw the pure glacial water of the McKenzie River turn into the murky water of the Willamette River.  Humans clearly have a significant impact on our rivers, especially in urbanized areas.  Construction poses serious problems to the riparian areas in particular and expose the aquatic environment to pollution and disturbance threats.

In order to reduce mankind’s impacts, it is important to educate the population according to Professor Forsyth’s method – generating awareness of the issues and appraising constructive behaviors – which will generate a sense of community and as a result, improvements will occur.  At the end of our cleanup at the Dutch Gap, there was an informative trailer teaching individuals about the impacts of litter on the ocean.  It gave specific facts such as decomposition times of glass bottles, plastic bags, and Styrofoam materials as well as suggested ways of reducing these impacts.  Construction companies, especially the on-site workers, should be informed of the consequences of their projects and littering to first eliminate some non-point pollution sources.  Our rivers have endured human threats, but it is time for us to fix the problems we created in our local environments.

Sources:

Cronon, William. “The Trouble with Wilderness: Or, Getting Back to the Wrong Nature.” Environmental History 1.1 (1996): 7-28. Web.

Walsh, Christopher, et al. “The Urban Stream Syndrome: Current Knowledge and the Search for a Cure.” The North American Benthological Society (2005): Web.

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A Refreshing Perspective into the Lake: Gambles Mill Corridor Tour (Field Trip)

Remnants of the algal blooms linger behind the commons

Remnants of the algal blooms linger behind the commons

We began our tour by walking along the outside of the commons. As we paused and looked out to the lake, we saw the water close to the edge of the lake glazed with a layer of green as a result of algae overgrowth. Most people who pass by this see this as a nuisance, thinking how poorly the school is managing the lake just in time for parents weekend. However, most do not know the full story. The algal blooms are the result of fertilizer runoff from the school’s baseball field and surrounding homeowners that contribute to the Little Westham Creek watershed. The growth is most abundant during last summer and early fall, and the staff shock the river with elemental copper to kill the algae a few times a year. The school also installed bubblers to keep the water moving and aerate the water by introducing oxygen. As student who views the lake as a beautiful focal point of the school, I had given little thought to the contributing polluting factors of the lake and to what extent the school is acting to keep the lake aesthetically pleasing to passer byers.

We moved passed the side of the commons looking out to the lake and walked over to the area behind commons. Since the THC acts as a dam, it is also a fish barrier. As we looked out to where the water drains out of the lake, we saw a multitude of carcasses of dead fish scattered about. Some were on the cusp of death, floundering about on the floor while a heron and a couple of birds glean from the benefits of the barrier. I have never seen the back of THC before, so I was fascinated and a little surprised. This space of lake drainage was tucked away from most of the public, which can be an example of place blindness.

Through student efforts, we looked at how our campus converted from coal to natural gas to reduce carbon dioxide emissions. There are also solar panels installed on top of the Recreation and Wellness center. As the school makes a public effort to become a more eco-friendly campus, there are also hidden drawbacks with new construction such as the parking lot on campus, which can adversely affect the creek’s ecosystem.  

This left me wondering: what else does the university do to look appealing for the audience? Are they affecting any other ecosystem besides the Little Westham Creek? This tour opened my eyes to be aware of my surroundings, especially here at the university.

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The Importance of Parks and Green Spaces (Synthetic #1)

Parks and green spaces are necessary to connect us to the outside world. As we zip by life in a fast-paced manner, especially as busy college students, the environment around us can easily be forgotten. By having the parks and green spaces around us, they can serve as a reminder of the importance of the environment and as an escape from our busy lives. In the Cronan Article “The Trouble with Wilderness”, he provides the distinction between the sublime and the wilderness. Wilderness is sacred, untouched nature. “Wilderness is the natural, unfallen antithesis of an unnatural civilization that has lost its soul. It is a place of freedom in which we can recover the true selves we have lost to the corrupting influences of our artificial lives.” The sublime demonstrates a more refined view of nature, creating a romantic, tame version of the wilderness for the public to see and use.  He argues that people work their everyday lives in urban cities, thinking that the place where they truly belong is in the wilderness: a distant place where we visit from time to time. By  idealizing the wilderness as a distant place, that often means not idealizing the environment in which we actually live, therefore leading to decreased awareness of our actions. Also, by having a sublime, it teaches us to adopt too high a standard of what counts as “natural”.

I agree with Cronan in that people who live in urbanized areas can tend to have a distant mindset of the wilderness and forget to care for the environment around them, but I wouldn’t know a better alternative. By having more people and civilization submerged into the wilderness, the more wilderness becomes tainted, leaving less to be explored and more of the refined sublime or the backyard. Although Cronan argues that people need to be in the wild all the time to remind themselves of the importance of their environment instead of having it as a distant getaway, I believe the the all natural lifestyle is not meant for everyone and that there are other ways for people to be conscious of their environment without having to be submerged in the wilderness all the time. Also, everyone living outdoors would take up more space and be less energy efficient compared to cities, according to Johan Lehrer in “Urban Myths”. Having nature implemented in our lives can be a good reminder for us that the wilderness exists beyond the urban city, and therefore lead to a more environmentally conscious attitude.

One example of creating an environmentally conscious attitude with a place is the Willamette River in Oregon. Along the river, there are park areas and walkways where people can enjoy themselves apart from the city life. People can also kayak, row, or swim in the river. Oregon is known for having an environmentally friendly culture, part of the reason for that could be the increased exposure to nature so close by the city. Portland uses 20% more renewable energy than the national average, one of the first cities to ban plastic bags, and a decent portion of the population uses bike or carpooling methods for transportation. Also having the opportunity to choose the environmentally conscious is important as well. People are surrounded by the sublime version of nature, which could serve as a factor as a reminder to be environmentally friendly.

Understandably, being surrounded in the sublime doesn’t necessarily equate to acting environmentally conscious. For example, there are many residents who live close to the James River. 91.3%  of people said it was important to keep waterways, streams, and ditches clean, but only 7.5% said clean watersheds are important. Living near the wilderness is not enough for people to be conscious of their actions. To help, there first needs to be awareness and knowledge about the environment, appraisal of the situation, and changes in behavior. One example of a way that Richmond helps this situation is through the Richmond Folk Festival. Although I did not attend the festival, Eugene’s blog post gave me a peek of what he experienced. The festival did not only bring out “hardcore nature enthusiasts, but rather common people with an appreciation for the river.” Events like this can help with awareness of the environment, and Eugene also mentioned the Cronan article and how national parks and public lands such as Brown Island act as a gateway for further passion in nature.

Cronan also mentions that by idealizing the wilderness as a distant place, that could lead to decreased awareness of our actions towards our immediate surroundings of our everyday lives. As Quinn pointed out in her response on why the long-view in critical to understanding the role humans in natural world, humans tend to look at the short-view of their actions when making decisions. Humans focus on the instant gratification of a solution without taking time to consider the long-term risks involved. Humans do this because it is easy, and it is also easy to forget about the consequences of our actions when we forget about the importance and the beauty of the environment around us. Therefore, by idealizing the wilderness from a distance, making short view decisions is easier to make. To have a reminder in our everyday lives with parks and green spaces can aid us in making long view  goals.

Rowers using Willamette River

Rowers using Willamette River in Portland, Oregon

I believe that there should be a balance between having a conscious awareness of our current environment and surroundings, and having nature be a part of our everyday lives as a reminder. Parks and green spaces are necessary to connect us to the outside world. Although Cronan may not agree and say that we need to submerge ourselves in the wilderness, not everyone is able to do so. So by having these green spaces, we can remind people to be conscious of their decisions on the environment in the long term through awareness and education of the environment around them.

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An Upstream Battle

We set course from the Huguenot Flatwater access point on the James River towards Bosher Dam.  The air was showing signs of a chill and the water was murky due to the recent heavy rainfall.  The riparian zone was saturated with sycamore and river birch and we could see paw-paw fruits floating on top of the water.

House fishshack

Huguenot Flatwater riparian area

Although the area was teeming with life, there were also signs of human influence.  The Huguenot bridge and the Willey bridge were along our journey upstream and created an urbanized atmosphere, similar to our paddle on the Willamette River.  When we reached Bosher Dam, we were able to take a closer look at the fish ladder.  This ladder was built in 1999 to allow passage of shad, striped bass, yellow perch, and herring upstream.  However, the structure is only functioning during the fish mating season of March to June.  As Quinn mentioned, we saw a single cormorant searching for vulnerable prey since the ladder was not operational during our visit.  The behavior of the cormorant may demonstrate a need for the fish ladder to be operational year-round to provide passage for the few fish would may need to reach the area upstream.

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Bosher Dam fish ladder

The dam itself serves no current environmental purpose – only to provide a peaceful boating territory for wealthy homeowners along the river.  If anything, the dam harms the local habitat due to a buildup of sediment at the base of the dam and the general disturbance of the aquatic area and its residents.  Bosher dam is now solely a convenience for humans and this perfectly exemplifies man’s dominance over nature just as the English colonists controlled it centuries ago.  Does man have a right to change nature for his own pleasure?  Anthropocentric advocates such as recreational users and some politicians may agree, but if all components of the surrounding environment are considered then the fish win.

 

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Where’s the River? at the Richmond Folk Festival

folk-festival

View of Richmond Folk Festival towards the Altria Stage and the James River and City of Richmond beyond.

No event brings thousands of people right beside the James River like the Richmond Folk Festival. The festival, which is held by the ruins of the Tredegar Mill and across the canal on Brown’s Island, is almost completely surrounded by water. However, while volunteering at the festival and roaming the festival grounds, I saw little connection to the water running through the festival grounds or the mighty river rushing past nearby.

The day of perpetual rain that was my first day of volunteering brought me closer to water than I cared to be as my jacket and boots ultimately failed to keep a single inch of my body dry. As I observed visitors of the festival braving the rainy conditions to enjoy the music or a cup of craft beer, the fact that they were literally surrounded by water did not seem to make them any more aware of the rising water running through the mill, the canal, or the river. When I returned the next day, the sunny weather appeared to encourage people to lift their heads and look around a little more, but again the bodies of water went unnoticed. Visitors of the festival are not there for the geographical points of interest in their vicinity, they attend for the music, food and beer. But their general lack of curiosity in the geography of the area did surprise me nonetheless.

Upon reflection, I realized that there is no part of the festival that would draw a visitor’s attention to the river or other body of water. One cannot miss the stream that flows over the waterwheel by the mill, or the canal when one crosses it to reach Brown’s Island, but otherwise the water is not highlighted in any way. Even when one stands on Brown’s Island, surrounded by water, one’s view of the river or canal is often blocked by trees, thereby blocking our awareness of the water. The only connection to the river, and the importance of protecting the river that I saw was a beautiful info-graphic painted around a drain that led into this river. As Dr. Forsyth wrote about in his model of awareness that we spoke about in class, if one is not even aware of something such a the presence of a local stream or river, it is impossible to appraise the condition of the water and then take necessary actions to improve the health of the water. This drain began to build a closer connection to the river for passersby, but even here it was difficult to see the connection to the water that flowed by out of view on the other side of that pipe; and of many, out of mind as well.

Painted drain within Folk Festival grounds

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Volunteering at the Richmond Folk Festival

Jack and I screamed and yelled and sang. It was a wet Friday evening, and standing together in our matching neon orange shirts, we chanted over and over…

“Keep the festival free! Every donation counts!”

The Richmond Folk Festival is an amazing event celebrating American culture. Altogether, the festival attracted over 125,000 people to flood to the banks of the James river to enjoy lively music, delicious food, refreshing drinks, and great times. The production of the event costs over 1.5 million dollars; therefore, Jack and I’s task of asking for donations was crucial to the continuation of the Folk Festival.

The Richmond Folk Festival attracted over 125,000 people.

The Richmond Folk Festival attracted over 125,000 people.

Asking for donations was a little frustrating initially. Wandering around the muddy lawn of Brown’s island, people were sparse and our bucket was empty. However, at the start of the loud rhythmic music, swarms of people crossed the bridge over to our island to dance. This was our shot. We found a perfect spot: right at the entrance of the bridge. It was impossible to miss us in our dazzling bright orange shirts. Shaking the bucket and dancing vivaciously, the donations started flowing. Everyone in attendance was enjoying themselves and bonding as fellow Richmond natives. People of all ages and backgrounds joyfully added money, loving the opportunity to support their community that put on such a great event. And supporting the community is crucial.

Having a great sense of community allows for people to be more aware of their surroundings and place in the ecosystem. We tend to care about issues more when we’re intertwined in a close community. It leads to awareness, appraisal, and action. Perhaps a stronger sense of community is the solution to many of the environmental problems we face today.

As the sense of community created by the event grew so did my tiredness. It was a long night of volunteering, and by the end, I was completely exhausted. Soon, the crowds began to clear out and the musicians packed up to leave for the night. Though the night was fading, my florescent orange tee shirt will never fade.

Our shirts were even more neon than shown in this picture.

Our shirts were even more neon than shown in this picture.

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Synthetic blog 1: A Case Against Damming

 

As the Willamette River gushes through the pine-covered Willamette watershed, one cannot help but notice its hastiness and desire to do what it does best- reshaping the channel morphology and sustaining a plethora of aquatic life. This hastiness could probably be attributed to its desire to flow freely without human alterations before it suffers again the brunt of man, who has erected dams incessantly at different stages of the river to exploit its grandiose powers for hydroelectric power production and navigation. Even though these efforts by man seem plausible, one thing remains, dams result in an immense reduction of sediment downstream. This reduction if not properly monitored, may consequently have adverse effects on the well-being of the stream ecosystems.wr

Figure 1: The fast flowing waters of the Willamette River in Lane County, Oregon.

 

Sediments play an invaluable role of creating diverse ecological habitats. Invertebrates and other micro-organisms rely on the simple habitats engineered by the river currents as the river deposits load and creates new pathways. These habitats support a community of organisms that depend on each other in magnificently interlinked foodwebs, while the river acts as a regulating agent determining the relocation and emergence of new habitats as it erodes bank channels and deposits sediment in different sections. This ensures redistribution of organisms along the river channel thus promoting biological diversity. It is this biological diversity that grants communities formidable strength to withstand perturbations such adverse weather changes by enhancing community succession and colonization of new habitats. However, with reduced sediment amounts due to damming, intermittent biotic populations along river channels are inevitable. These erratic populations if not properly monitored may become extinct. For instance, sensitive micro-invertebrates and migrating birds that rely on such habitats for spawning or foraging may experience a population bottleneck or forced emigration that leads to population outbursts in other ecosystems while leaving unfilled ecological niches in the previous habitats. The ultimate effect is the loss of ecological diversity and species succession, all attributable to damming of hydrologic systems.

Moreover, reduction of sediment downstream has resulted in compromised water table levels. This is because with reduced sediment in a river’s current, the velocity of the river augments. This can be detrimental to the channel morphology as the river uses its grinding powers to make deep incisions into its river bed and causes massive erosion of its banks. The result is a reduction of the subsurface water levels as water percolates deep into hd

Figure 2: Increased stream velocities cause massive downcutting of their riverbeds leading to lowering of streams and consequently the watertable.

the underground aquifer. Aquatic animals and other riparian vegetation now suffer the brunt of a hydrologic drought. Survival for the fittest demands that aquatic organisms have to either move upstream to escape the adverse effects of the hydrologic drought downstream or die from intraspecific competition for the limited resources with other aquatic animals. On the other hand, the initially water-logged soils of the riparian zone now become dry soils that allow free movement of air between their crevices. Nitrogen is able to accumulate in these soils and is released into water channels when the water table rises during events such as floods or hurricanes. This deposition of nitrogen into water sources has the effect of increasing algal blooms and ultimately causing eutrophication. Likewise, with reduced water levels comes reduced riparian vegetation cover. A huge portion of the invaluable function played by riparian zones as buffer systems is lost and streams become exposed to the raging effects of pollution from nearby ecosystems. This is double tragedy to aquatic life that now have to show forbearance towards the scarce water burden due to diminishing water table levels, and imminent threats from pollution. In the long-term, adverse ecological problems are inevitable.

Evidently, floodplains rely heavily on sediments carried downstream by rivers. These sediments are the veins of floodplains, as they are responsible for the fertile soils that make floodplains agriculturally viable regions rather than pools of waterborne infections such as Bilharzia. Native Americans that lived along the coastal plains of the James River particularly relied on the rich soils of the tidewater region to grow subsistence crops such as corn and beans. These coastal plains produced substantial amounts of food that enabled trade within the Native American tribes. Similarly, today many countries rely on floodplains for food production. These extensive tracts of floodplains play a critical role of

fp

Figure 3: Farming on the Yamuna River floodplains in Delhi.

curbing food insecurity and providing an impetus for economic growth. Moreover, floodplains have proven to be invaluable water filters. Studies show that when floodplains get inundated with water, they act as natural filters that remove excess sediment and nutrients from the water before it enters other hydrologic systems. This is significant to the health of aquatic animals and human beings that draw water from such systems.  Degradation of water quality has particularly been observed along small rivers and at hypoxic regions of large rivers due to loss of floodplain habitat. This loss thus allows excessive nutrients to enter hydrologic systems. Damming consistently reduces the amount of sediments reaching the coastal plains thus massively contributing to the exacerbation of this water quality issue. Ultimately, flood plains that once served the invaluable functions mentioned above become ineffectual areas of no ecological or human significance.

It is eminent that dams cause appalling effects to ecological and hydrologic systems in the long-term. These effects lead to loss of ecological diversity and degradation of land and other water resources. These effects may take time before they are discernible to us because the rather ephemeral benefits we derive from damming such as hydroelectric power production, enhanced navigation and recreation blind us from foreseeing the ultimate ecological impacts of our actions. Unfortunately, the end result is a loss both to man and ecosystems subservient to him.

 

 

References:

http://www.nature.org/ourinitiatives/habitats/riverslakes/benefits-of-healthy-floodplains.xml

https://www.google.com/searchq=reduced+water+tables&espv=2&biw=1366&bih=613&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjtzoSNiNPPAhVJcD4KHRWmBFAQ_AUIBygC#tbm=isch&q=river+incision+&imgrc=vUQzX_y3q0DY7M%3A

https://www.google.com/search?q=floodplain+on+yamuna+river&espv=2&biw=1366&bih=662&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjfz6H_yN_PAhWIoD4KHZ_rDDIQ_AUIBigB#tbm=isch&q=yamuna+floodplains&imgrc=dMynlil-XXOmVM%3A

 

 

 

 

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Killing for life

Belmead was 50 or 100 years past its prime. The parking lot could hold hundreds of cars,

Belmead Mansion

Belmead Mansion

but it looked like ours were the only ones it had seen in years. The mansion was proud, but showed its age through its stained walls and worn windows. We were here to kill an invasive species called tree of heaven. When it grows, tree of heaven releases a chemical from its roots that inhibits the growth of other plants around it. We methodically killed these plants with pesticide so that the ones we preferred could live.

 

tree of heaven

Tree of Heaven, native to China

Killing trees of heaven at Belmead felt wrong. Even knowing that it would increase diversity in the riparian zone along the James. Even knowing that the plant is an “invasive” that’s too good at propagating to be left alone. Even knowing that we were making the James better, killing for the sake of life seemed strange. Not in the sense that every living thing is sacred and priceless, because every choice of preference proves it’s not. Rather, in the sense of “who are we to choose one species over another?” Humans already have an oversized role in influencing the biosphere; why can’t we step back and let nature done as it has for millions of years before we started moving game pieces in the first place?

 

We can’t because to step back would be to ignore our oversized impact on the biota of this earth. Humans have long since passed the point where we can stop interfering with earth’s natural development. We’ve already thousands of species to endangerment and extinction; to limit our interference where we may actually be able to increase biodiversity seems irresponsible. The question now is how best to interfere while holding both biodiversity and human preeminence in the balance.

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River Rat Paddle

 

With a cool fall breeze we beached our kayaks and hopped onto the bank. A long tiring paddle up the river has taken us here, we are at the fish ladder. During our River Rat patrol last Friday, we took time to explore the Bosher Dam. This is a historic dam, constructed in 1835. Our River Rat control determined that wildlife was abundant, and trash in the area was at a minimum. We also saw the pinnacle of all things to improve the health of the James, was the fish ladder. Although not operational last week, during peak migration season the Bosher Dam fish ladder successfully helps fish move up and down the river. From our visit to the Bonneville Dam, we learned about how important fish ladders are to the ecosystem. Fish ladders are one of the most important tools to improve the health of the river, yet the Bosher Dam fish ladder was not contrasted until 1999. Why is this? What took so long and how much damage did the river receive? Historically, fish ladders have existed in France since the 17th century.   Despite this, modern fish ladders have not been implemented into there was proof that they are beneficial for the river, and that proof only came from scientific research.

 

Example Fish Ladder

How a Fish Ladder Works

 

 

Looking at a small section of the river, it may not seem like fish ladders are required. Scale is important to consider because realistically that fish doesn’t actually have to move to the other side of the dam to survive. Food and habitat is still abundant on the down river side. One has to look at larger scale, both physical and time, to find importance of fish ladders. Many species, like the sturgeon we study in class, migrate up and down the river for different life stages. So yes, that one fish will survive if there was no fish ladder, and it was stuck on one side of the dam. But all of the generations after will suffer and successful breeding may be reduced to zero. After this the region where the fish used to travel will be effected. No longer will that fish be hunting on the smaller organisms and other food sources. The balance of the ecosystem will be thrown off, and we can only hope will be able to recover without that once important species once there.

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Spiral Fish Ladder in France

 

 

For all of these reasons fish ladders have been proven successful. Research like this drives public policy, and without any research there would be a lack of informed decision making. This is why federal funding for long term projects, like those undertaken in the Andrews Experimental Forest are important. The HJA itself did not produce fish ladder studies, but many scientific discoveries have been made there, as is described in my blog on the subject. Nevertheless, some recently published studies have suggested that fish ladders do not promote safe travel up river, instead they actually have a negative effect by allowing predators access to the very species the ladder was designed to protect. (Agostino et al. 2012) Research is not binary. Fish ladders cannot not switch from being inherently good nor bad. One study does change conventional wisdom. Instead long term studies can show general trends, and without these it is hard to put all the puzzle pieces together in order to save our great James River.

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