Patterns of Fish Communities and Limnological Conditions Relative to Floodplain Landscapes PDF Download
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Author: Seiji Miyazono
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages :
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Book Description
The Yazoo River Basin of Mississippi includes several rivers and hundreds of floodplain lakes within an area greatly impacted by agriculture. I studied 17 of these lakes distributed over the lower half of the Yazoo River Basin to document fish assemblages and limnological patterns and to identify environmental variables that might influence these assemblages. Potential connectivity of the lake to parent river and wetland-lake area ratio in the watershed were related to the limnological conditions and fish communities. Lakes with greater potential connectivity tended to be deeper and had greater specific conductance and greater fish species richness including more riverine species. Conversely, as the potential connectivity decreased, lakes were shallower, had greater chlorophyll-a fluorescence, wetland-lake area ratio, and a less speciose lacustrine fish community. Species richness and assemblage composition of riverine species were related directly to potential connectivity. Lacustrine species assemblages were linked to wetland-lake area ratio and turbidity.
Author: Seiji Miyazono
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages :
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Book Description
The Yazoo River Basin of Mississippi includes several rivers and hundreds of floodplain lakes within an area greatly impacted by agriculture. I studied 17 of these lakes distributed over the lower half of the Yazoo River Basin to document fish assemblages and limnological patterns and to identify environmental variables that might influence these assemblages. Potential connectivity of the lake to parent river and wetland-lake area ratio in the watershed were related to the limnological conditions and fish communities. Lakes with greater potential connectivity tended to be deeper and had greater specific conductance and greater fish species richness including more riverine species. Conversely, as the potential connectivity decreased, lakes were shallower, had greater chlorophyll-a fluorescence, wetland-lake area ratio, and a less speciose lacustrine fish community. Species richness and assemblage composition of riverine species were related directly to potential connectivity. Lacustrine species assemblages were linked to wetland-lake area ratio and turbidity.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The Yazoo River Basin of Mississippi includes several rivers and hundreds of floodplain lakes within an area greatly impacted by agriculture. I studied 17 of these lakes distributed over the lower half of the Yazoo River Basin to document fish assemblages and limnological patterns and to identify environmental variables that might influence these assemblages. Potential connectivity of the lake to parent river and wetland-lake area ratio in the watershed were related to the limnological conditions and fish communities. Lakes with greater potential connectivity tended to be deeper and had greater specific conductance and greater fish species richness including more riverine species. Conversely, as the potential connectivity decreased, lakes were shallower, had greater chlorophyll-a fluorescence, wetland-lake area ratio, and a less speciose lacustrine fish community. Species richness and assemblage composition of riverine species were related directly to potential connectivity. Lacustrine species assemblages were linked to wetland-lake area ratio and turbidity.
Author: Sandra J.. Clark
Publisher:
ISBN:
Category : Fish communities
Languages : en
Pages : 324
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Book Description
Abstract: Floodplain lakes have been extensively studied in tropical systems, but little is known about the influence of connectivity on floodplain lake fish communities in temperate systems. Relationships between floodplain lake connectivity and fish community dynamics within the White River National Wildlife Refuge, Arkansas were investigated and temporal patterns of fish communities were characterized. In 2002,2004, and 2005, a total of 41 floodplain lakes were sampled using various combinations of gears including: boat electrofishing, experimental gill nets, mini-fyke nets, and large-mesh gill nets. Environmental variables including water quality, lake morphometrics, and quantitative measures of connectivity were measured for each lake. Canonical correspondence analysis identified temperature, lake shape, type of connection, and start date of connection as most important in the structuring of floodplain lake fish communities. Three floodplain lake classification types were generated with large, deep, long, and narrow lakes with great temporal connection via a slough or bayou having greater abundances of rheophilic species. Intermediate size, shape, depth, and connectivity lakes were associated with rheophilic and more lacustrine species; while small, shallow, round lakes with low temporal connection due to overbank connection were associated with more lacustrine species. Five floodplain lakes followed over the entire 4-year period (2002,2004, and 2005) demonstrated a shift from cyprinid to cyprinid/centrarchid dominated systems; however, no temporal changes in richness or diversity were found. Previous year's connectivity may have influenced dominance shifts more rheophilic species toward more lacustrine species in subsequent years as connectivity conditions changed. Eight floodplain lakes were sampled during periods of documented with some lakes becoming completely inundated during high stage conditions while others were only connected via a ditch. During connection, lakes with complete inundation had lower catch per unit effort and diversity than lakes with ditch connection. It seems likely that fish dispersed from inundated lakes into the floodplain for spawning. Additionally, measured spatial and temporal connection gradients appeared to influence fish communities in floodplain lakes during periods of connection and disconnection. Connectivity is more important in influencing floodplain lake fish communities than previously documented.
Author: Mississippi State University. Forest and Wildlife Research Center
Publisher:
ISBN:
Category : Forest products
Languages : en
Pages : 96
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Book Description
Author: Daniel Marques Almeida Pessoa
Publisher: Frontiers Media SA
ISBN: 2832523757
Category : Science
Languages : en
Pages : 164
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Author: Anik Bhaduri
Publisher: Springer
ISBN: 3319075489
Category : Science
Languages : en
Pages : 436
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Book Description
The Global Water System in the Anthropocene provides the platform to present global and regional perspectives of world-wide experiences on the responses of water management to global change in order to address issues such as variability in supply, increasing demands for water, environmental flows and land use change. It helps to build links between science and policy and practice in the area of water resources management and governance, relates institutional and technological innovations and identifies in which ways research can assist policy and practice in the field of sustainable freshwater management. Until the industrial revolution, human beings and their activities played an insignificant role influencing the dynamics of the Earth system, the sum of our planet‘s interacting physical, chemical, and biological processes. Today, humankind even exceeds nature in terms of changing the biosphere and affecting all other facets of Earth system functioning. A growing number of scientists argue that humanity has entered a new geological epoch that needs a corresponding name: the Anthropocene. Human activities impact the global water system as part of the Earth system and change the way water moves around the globe like never before. Thus, managing freshwater use wisely in the planetary water cycle has become a key challenge to reach global environmental sustainability.
Author: J.V. Ward
Publisher: Springer Science & Business Media
ISBN: 9401701814
Category : Science
Languages : en
Pages : 328
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Book Description
This book is a monograph reporting the major findings from a comprehensive study of a glacial flood plain in the Swiss Alps, based on an intensive research program conducted year-round over several years. Until recently, very little was known regarding the ecology of glacial streams. Previous studies typically focused on one or a few aspects and were limited to the summer period. Moreover, this is the first ecological study of a glacial flood plain with a dynamic, multi-thread channel network. Year-round sampling of a system with a complex channel network spawned unanticipated results and new insights into the ecology of glacial streams. The book begins with the landscape features, glacial history, and floodplain evolution of the Val Roseg. This is followed by chapters on channel typology, groundwater-surfacewater interactions, thermal heterogeneity, and nutrient dynamics. Chapters on the biota deal with terrestrial and aquatic flora, hyphomycete fungi, surface zoobenthos, and the interstitial fauna. Functional processes are addressed in chapters on organic matter dynamics, litter decomposition, nutrient limitation, and drift and colonization patterns. The final chapter provides a synthesis of our current understanding of the ecology of Val Roseg. Weare indebted to many individuals and organizations for assistance and support of the research program on the Val Roseg and the production of this book.
Author:
Publisher:
ISBN:
Category : Aquatic biology
Languages : en
Pages : 406
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Book Description
Author: M. Jungwirth
Publisher: Springer Science & Business Media
ISBN: 9401141649
Category : Technology & Engineering
Languages : en
Pages : 491
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Book Description
The assessment of the ecological integrity of running waters is a prerequisite to an understanding of the effects of human alterations. The evaluation of degradation processes provides key information on how to avoid further negative impacts. The success of future conservation, mitigation and restoration activities will rely on sound assessment methodologies and their ecological relevance and applicability. Assessment methodologies are therefore an integral part of sustainable river management. This book synthesizes and discusses state-of-the-art experiences in assessment methodologies. Including the latest knowledge on structures, processes and functions of running waters as a fundamental basis for developing adequate assessment methods, the book focuses on method development, application, and in particular on integrated assessment methods. This book is directed at scientists and managers with the aim of more effective preservation, restoration and maintenance of the ecological integrity of running water ecosystems.
Author: Karl M. Wantzen
Publisher: Springer Science & Business Media
ISBN: 1402091923
Category : Technology & Engineering
Languages : en
Pages : 184
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Book Description
Most aquatic ecosystems have variable water levels. These water-level fluctuations (WLF) have multiple effects on the organisms above and below the waterline. Natural WLF patterns in lakes guarantee both productivity and biodiversity, while untimely floods and droughts may have negative effects. Human impacts on WLF have led to a stabilization of the water levels of many lakes by hydraulic regulation, untimely drawdown due to water use, or floods due to water release from hydropower plants in the catchments. This book provides a first review in this field. It presents selected papers on the ecological effects of WLF in lakes, resulting from a workshop at the University of Konstanz in winter 2005. Issues addressed here include the extent of WLF, and analyses of their effects on different groups of biota from microorganisms to vertebrates. Applied issues include recommendations for the hydrological management of regulated lakes to reduce negative impacts, and a conceptual framework is delivered by an extension of the floodpulse concept for lakes. Current impacts on water use, including increasing demands on drinking and irrigation water, hydropower etc., and climate change effects on WLF make this book an essential resource for aquatic ecologists, engineers, and decision-makers dealing with the management of lake ecosystems and their catchments.
