Download or read book Feeding Rates and Prey Selection by the Invasive Asian Clam Corbicula Fluminea on Microplankton in the Columbia River North America written by Benjamin A. Bolam and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assembly and Functions of Gut Microbiota in Aquatic Animals written by Qingyun Yan and published by Frontiers Media SA. This book was released on 2022-11-18 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth and Condition of the Invasive Asian Clam Corbicula Fluminea in the Lower Columbia River USA written by Summer J. Henricksen and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Asian clam, Corbicula fluminea, is a broadly distributed and abundant invasive species, yet many aspects of its population biology (e.g., growth and condition in relation to environmental variables) are not well understood. Based on previous research by other investigators, we hypothesized that abundance, population growth rate, and individual growth rate of C. fluminea would increase with temperature, chlorophyll-a, and dissolved oxygen. We sampled C. fluminea at two sites (Kalama and Blurock) in the lower Columbia River (CR), USA. Modal progression analyses indicated a life span of 2-3 years, with new young-of-the-year recruits ( 15 mm), one-year old (13-25 mm), two-year old (20-33mm), and three-year old (30-43mm) clams present. A generalized linear mixed model (GLMM) predicting the abundance of C. fluminea indicated a significant negative association with chlorophyll-a concentration, whereas a GLMM predicting the population growth rate of C. fluminea indicated a significant positive association with dissolved oxygen. The GLMM predicting the individual growth rate of C. fluminea indicated the individual growth rate was not significantly related to any individual environmental variable, however the interaction between temperature and year was significant. The morphological condition (weight at length) of C. fluminea varied significantly between our two sites, with smaller clams (
Download or read book Broadscale Distribution Abundance and Ecological Associations of Veligers of the Invasive Asian Clam Corbicula Fluminea in the Columbia River Basin written by Whitney Paige Hassett and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Broadscale Distribution Abundance and Habitat Associations of the Invasive Asian Clam Corbicula Fluminea in the Lower Columbia River USA written by Salvador B. Robb-Chavez and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Asian clam, Corbicula fluminea, is an invasive freshwater bivalve that has established populations across the globe and is known to have deleterious effects on natural and human systems. Yet, despite being present in the Columbia River (CR) for nearly a century, little is known about this invader's basic biology and ecology in this large river system. Thus, we undertook a field study to assess its i) broadscale distribution and abundance, ii) associations with habitat characteristics, and iii) weight-at-length relationship in the lower CR. During 2019-21, C. fluminea were collected from 27 shore-based and 15 mid-channel stations spanning 481 river kilometers (RKM) of the lower CR, along with several habitat characteristics (bank slope, temperature, dissolved oxygen, pH, salinity, conductivity, depth, Secchi depth, chlorophyll-a concentration, river kilometer, and sediment composition). C. fluminea abundance ranged from 0-430 ind. m-2, with the majority of sites containing abundances >100 ind. m-2, located downstream from Bonneville Dam and the majority of sites containing abundances of 0 ind. m-2 located upstream. Generalized linear models predicting the abundance of C. fluminea indicated significantly positive correlations with water temperature, % sand and river kilometer, and negative correlations with bank slope and sedimentary organic material. Clams occurring upstream of Bonneville Dam exhibited greater weight-at-length than those occurring downstream. Our investigation represents the greatest spatial extent at which C. fluminea has been studied in the CR and our results provide a better understanding of the basic biology and ecology of this global invader, as well as providing natural resource managers with information on habitat conditions favorable for this invasive bivalve within temperate river ecosystems.
Download or read book SAMMELBAND VADIANA VMISC QA 2 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variation in Cold Tolerance Among Populations of the Invasive Asian Clam Corbicula Fluminea written by Emilija Cvetanovska and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Asian Clam Corbicula fluminea is one of the most invasive freshwater molluscs in the world. In north temperate regions, this subtropical species is typically restricted to artificially heated waterbodies. Its distribution has long been believed to be constrained by a lower temperature tolerance limit of 2°C, based on a frequently-cited study of a single southern population. However, overwintering populations have been discovered in some lakes and rivers in northeastern North America in recent years. I explored the hypothesis that cold tolerance of C. fluminea varies across its invaded range, by using a series of experiments on clams from six geographically distinct populations along a latitudinal gradient in eastern North America. These experiments revealed that C. fluminea can tolerate prolonged exposure to near freezing conditions and that survivorship differs across populations. Each population contained individuals that survived two months at ~0.5-1°C. Survivorship of individuals across all populations was significantly enhanced by prior acclimation to a low temperature (10°C) compared to a higher one (18°C). When acclimated to 10°C, clams from northern populations showed greater survivorship (55.0± 16.1%) than those from southern populations (26.7± 19.2%), but no difference was observed at 18°C. At both acclimation temperatures, larger clams had a higher survivorship than smaller clams. I hypothesize that physiological plasticity and acclimation history accounts for variation in cold tolerance across these populations. The results highlight the need for risk assessments of invasive species to incorporate physiological data from multiple populations, as predictions derived from single populations could be erroneous. However, a literature search of experimental studies on environmental tolerances of aquatic invasive animals found that only 8% of these studies compared at least two or more distinct populations of a given species. Similarly, a specific search that focused on the 20 aquatic invasive animals considered among the "world's worst" invaders found that only
Download or read book Population Characteristics and Habitat Use by the Recently Introduced Asiatic Clam Corbicula Fluminea in Lake Whatcom Washington written by Jason Alexander Buehler and published by . This book was released on 2017 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Asiatic Clam (Corbicula fluminea) was found in Lake Whatcom in 2011. This exotic clam is common throughout North America and is spread between watersheds by infested boats, fishing activities, as well as passively by waterfowl. Corbicula fluminea is a well documented invasive species that survives in many environments and exhibits an r-selected life history which can lead to potentially rapid population growth via a clonal reproductive ability typical among invasive bivalves and members of the family Corbiculidae. There are more reproductive strategies in Corbiculidae than any other freshwater bivalve. This rapid growth of a single organism and its associated consumption and excretions can lead to undesired changes in an aquatic ecosystem. Studies have shown a drop in species richness, alterations to algal communities and their availability to other organisms, and water quality changes associated with burrowing, shell accumulation, and clam decomposition. My research included an assessment of the growth of representative Lake Whatcom clam populations during 2012 and 2013 using shellfish surveying methods that have been applied to the marine intertidal environment. Surveying was based on multiple transects with randomly sampled 0.25-square meter quadrats. Three sites were identified that had populations of the clam and were accessible for surveys. These sites were Bloedel Donovan Park in the City of Bellingham, Lakewood, a facility run by Western Washington University, and a small park beach within the community of Sudden Valley. Surveys showed sample areas with 200 or more individual clams per square meter at all three sites. Studies state this density to be indicative of a self-sustaining population for C. fluminea. Some sites exhibited an increase in biomass and size from 2012 to 2013. All sites showed significant changes among some size classes that suggest growth. The sand and fine sediment substrate of the Sudden Valley site hosted significant density increases and biomass increases from 2012 to 2013. The harder rocky substrate of Lakewood hosted multiple size classes but did not show evidence of growth. Bloedel Donovan Park differed from the other sites in that it had a small size class in 2013 that was not present in 2012 suggesting a new generation of clams had reseeded the habitat. The overall environment within Lake Whatcom does not appear to be conducive to extended periods of reproduction based on the presence of distinct size classes. Distinct size classes are representative of specific reproductive windows during the year made available during the warmer months of summer. Density and biomass changed with depth within the nearshore shallows suggesting that the cooler deeper waters of the lake are not as suitable to the clam as the warmer, shallower areas within the littoral zone. Another explanation is less phytoplankton availability due to light limitations imposed by depth. Corbicula fluminea appears to be reproducing to varying degrees at all three sites in this study, and it will likely continue to spread to suitable habitat within Lake Whatcom. Typical impacts associated with the clam should be expected. These include changes in species richness, especially changes in native filter feeder concentration as well as changes to phytoplankton density, and alterations to the seston nutrient load because of burrowing and biological functions associated with C. fluminea
Download or read book Effects of the Invasive Asian Clam Corbicula Fluminea on the Littoral Communities of Lake Constance written by Stefan Werner and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Activity and Feeding Modes of the Asian Clam Corbicula Fluminea written by Tanya Kristin Troutner and published by . This book was released on 1996 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Invasive Clams in Lake Tahoe written by Marianne Denton and published by . This book was released on 2011 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive species are of concern to ecologists and resource managers due to the growing ecological and economic impacts associated with their introduction. In North America, invasive species cause significant environmental impacts with costs estimates of $137 billion annually. Second to loss of habitat, invasive species have been linked to the declines in biodiversity on a global scale. Once established, invasive species have been shown to alter community and ecosystem dynamics, change habitat for native species, interrupt energy flow through food webs, and reduce ecosystem services. Among non-native aquatic species, invasive bivalves can cause significant impacts by altering the availability of resources, contributing to the extirpation of native species, declines in diversity and impairment of ecosystem functioning. They are able to tolerate a wide range of environmental conditions (temperature, water chemistry, substrate, etc.), allowing them to acclimatize to a new environments, making them adaptable to exploit ecological niches. In the last century, Corbicula fluminea (Asian clam) has been one of the more successful invasive bivalves to establish in aquatic ecosystems. C. fluminea is an invasive freshwater bivalve to North American that originally established in Pacific Northwest in 1938 from Southeast Asia, and has since been documented in 42 states. The shells of dead C. fluminea may provide refuge and substrate for the establishment of benthic larval insect communities and live clams may influence benthic communities by processes of bioturbation of sediment via burrowing and biodeposition of organic matter as feces and pseudofeces. Through highly efficient suspension-feeding and deposit- feeding on sediment organic matter, C. fluminea may also couple the pelagic and benthic food webs. The vectors of invasion are live bait buckets however the release of aquarium stock and transport via boat bilge is possible. Recently there has been an invasion of C. fluminea in Lake Tahoe, a large, deep subalpine lake located in the central Sierra Nevada of California and Nevada. Very little is known about the life history or impacts of clams on the ecology of the lake; however, preliminary research suggests they may linked to increased nearshore algal blooms. The chapters included here examine the reproductive strategies (Chapter 1) and impacts to native benthic community structure (Chapter 2) by C. fluminea in Lake Tahoe. In Chapter 1, it was determined that C. fluminea in Lake Tahoe had a low reproductive effort with a single spawn that occurred in late summer that is likely linked to the temperature and low food availability. Moreover, deeper water populations of clams are likely populations sinks dues due to the cold temperatures. Chapter 2 shows how C. fluminea changes benthic community structure depending on the level of infestation. It was determined that three taxa had greater abundances where abundances of C. fluminea are low. In areas with greater abundance, C. fluminea facilitate two taxa, Chironomidae and Trichoptera. While the mechanisms were not studied, the shells of clams may provide structure and thus habitat for certain invertebrates. Other mechanisms of facilitation such as competition or providing increased food supply through the release of pseudofeces may also impact community structure. Other behavioral experiments and raw data not formally presented in chapter form are presented in the Appendix. As the establishment of C. fluminea is still in an early stage of invasion, future studies and monitoring will be essential to further determine how the clam impacts Lake Tahoe's ecosystem.
Download or read book Review of the Invasive Asian Clam Orbicula Spp Bivalvia Cyrenidae Distribution in North America 1924 2019 written by Amy J. Benson and published by . This book was released on 2021 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Secondary Production Levels of the Asiatic Clam Corbicula Fluminea from the Sacramento San Joaquin Delta written by Leo H. Winternitz and published by . This book was released on 1992 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology and Classification of North American Freshwater Invertebrates written by James H. Thorp and published by Academic Press. This book was released on 2010 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The third edition of Ecology and Classification of North American Freshwater Invertebrates continues the tradition of in-depth coverage of the biology, ecology, phylogeny, and identification of freshwater invertebrates from the USA and Canada. This text serves as an authoritative single source for a broad coverage of the anatomy, physiology, ecology, and phylogeny of all major groups of invertebrates in inland waters of North America, north of Mexico." --Book Jacket.
Download or read book Shallow Lakes 95 written by Lech Kufel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shallow lakes differ from deep ones in many aspects of nutrient dynamics, biotic structure and interactions of various trophic levels. Though very common in European lowlands, shallow lakes attract inadequate attention from research teams. This book aims at filling gaps in our knowledge of the processes which take place in non-stratified lakes. It contains proceedings from the international conference `Shallow Lakes *95' held in Mikolajki, Poland, on 20-26 August 1995. In more than 50 original papers up-to-date views on eutrophication, degradation and recovery of shallow lakes are presented. The first four sections of the book (Nutrient fluxes, Biotic structure, Trophic interactions and Whole lake studies) deal with theoretical aspects of lake functioning while the fifth (Biomanipulation, restoration and management) is devoted to practical measures undertaken to improve water quality in shallow lakes. The book is therefore addressed to university biologists and ecologists and PhD students, as well as to managers involved in restoration of shallow lakes.
Download or read book Ecology of Marine Bivalves written by Richard F. Dame and published by CRC Press. This book was released on 2016-04-19 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploring the potential use of bivalves as indicators and monitors of ecosystem health, this book describes live and computer simulated experiments, mesocosm studies, and field manipulation experiments. This second edition discusses major new developments, including phase shifts in many coastal and estuarine ecosystems dominated by suspension-feeding bivalves, the invasion or introduction of alien bivalve species, the rapid growth of environmental restoration focused on bivalves, and the examination of geological history with regard to global climate change and its impact on bivalve-dominated systems.
Download or read book Diet for a Sustainable Ecosystem written by Benjamin E. Cuker and published by Springer. This book was released on 2020-08-11 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores a specific ecosystem in depth, in order to weave a story built on place and history. It incorporates the theme of a journey to help reveal the environment-human-health-food system-problem. While drawing on a historical approach stretching back to the American colonial era, it also incorporates more contemporary scientific findings. By crafting its story around a specific place, the book makes it easier for readers to relate to the content, and to subsequently use what they learn to better understand the role of food systems at the global scale.
