Download or read book Growth Reproduction and Thermal Tolerance of the Asiatic Clam Corbicula Fluminea in a Northern Temperate Habitat written by Patricia A. White and published by . This book was released on 1985 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Malacological Review written by and published by . This book was released on 1995 with total page 484 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 The Northern Range Extension of the Invasive Bivalve Corbicula Fluminea written by Andrea Morden and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Asian clam Corbicula fluminea - one of the world's most invasive freshwater species - was previously believed to be limited to warm temperate habitats, but has extended its North American range northward into cold temperate waters in recent years. Using lab experiments, I show that C. fluminea tolerance to low oxygen varies across populations; therefore, risk assessments that are based on environmental tolerance data derived from only a single population are unreliable. Using climate suitability modeling techniques, I identify regions in North America at risk of C. fluminea invasion under current and future climate conditions. Finally, I experimentally quantify variation in shell degradation rates across different habitat conditions, to evaluate the feasibility of using spent shells as an indicator of establishment success. These results highlight the importance of accounting for phenotypic variation and context dependence when identifying ecosystems at risk of invasion. " --
Download or read book Growth of the Juvenile Freshwater Asiatic Clam Corbicula Fluminea as an Indicator of Sublethal Stress in a Small California Stream written by James Daniel Tull and published by . This book was released on 1989 with total page 216 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 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 The Effect of Temperature Suspended Sediment and Food on the Growth of Corbicula Fluminea Bivalvia written by Christopher Glen Foe and published by . This book was released on 1985 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Effects of Water level Fluctuations in Lakes written by Karl M. Wantzen and published by Springer Science & Business Media. This book was released on 2009-05-06 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Chromosomes Reproduction and Genetic Relationships of Introduced Asiatic Clams Corbicula in North America written by Sirirat Siripattrawan and published by . This book was released on 2001 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Tolerance of the Adult Asiatic Clam Corbicula Manilensis Mollusca Bivalvia written by J. S. Mattice and published by . This book was released on 1975 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology of Freshwater Corbiculid and Sphaeriid Clams of North America written by Gerry L. Mackie and published by . This book was released on 2007 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology and Population Dynamics of the Asiatic Clam Corbicula Manilensis Philippi 1841 in the Delta Mendota Canal San Joaquin Valley California written by Larry Lee Eng and published by . This book was released on 1977 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxygen Consumption Temperature Tolerance and Filtration Rate of the Introduced Asiatic Clam Corbicula Manilensis from the Tennessee River written by Martin Louis Habel and published by . This book was released on 1970 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Advances in Ecological Environmental Sciences written by and published by . This book was released on 1992 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Elevated Temperature on the Metabolic Physiology of Non native Asiatic Clam Corbicula Fluminea written by Kaitlyn Gregory and published by . This book was released on 2016 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
