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Full-Text Articles in Life Sciences
Northern Range Expansion And Coastal Occurrences Of The New Zealand Mud Snail Potamopyrgus Antipodarum (Gray, 1843) In The Northeast Pacific, Timothy Mathias Davidson, Valance E. F. Brenneis, Catherine E. De Rivera, Robyn Draheim, Graham E. Gillespie
Northern Range Expansion And Coastal Occurrences Of The New Zealand Mud Snail Potamopyrgus Antipodarum (Gray, 1843) In The Northeast Pacific, Timothy Mathias Davidson, Valance E. F. Brenneis, Catherine E. De Rivera, Robyn Draheim, Graham E. Gillespie
Environmental Science and Management Faculty Publications and Presentations
The New Zealand mud snail Potamopyrgus antipodarum (Gray, 1843) is a common invasive species in fresh and brackish water ecosystems in Europe, Australia, Japan, and North America. In some invaded habitats, P. antipodarum can reach high densities (over 500,000 snails m-2) and dominate the biomass of the benthos, leading to detrimental impacts to native biota and changes in ecosystem dynamics. We report the previously unpublished occurrence of P. antipodarum in thirteen fresh and brackish water systems adjacent to the Pacific coast of North America including a new northern range for P. antipodarum: Port Alberni, Vancouver Island, British …
Dispersal Limitation And Climate-Related Environmental Gradients Structure Microcrustacean Composition In Freshwater Lakes, Ellesmere Island, Canada, Angela L. Strecker, Rebecca Milne, Shelley E. Arnott
Dispersal Limitation And Climate-Related Environmental Gradients Structure Microcrustacean Composition In Freshwater Lakes, Ellesmere Island, Canada, Angela L. Strecker, Rebecca Milne, Shelley E. Arnott
Environmental Science and Management Faculty Publications and Presentations
Dramatic environmental change is expected in the Arctic, yet little is known about the occurrence and community composition of microcrustaceans in Arctic lakes and how this will be influenced by future environmental change. We sampled and calculated relative abundances of microcrustacean species in 54 lakes on Ellesmere Island, Canada. New species records on Ellesmere Island included Daphnia umbra, Tachidius discipes, and Artemeopsis stefanssoni. Daphnia middendorffiana/tenebrosa was the most common taxon and often dominated microcrustacean assemblages, likely a result of its pigmentation, which offers resistance to ultraviolet radiation. Species richness was positively associated with nutrients, dissolved organic carbon (DOC), temperature, calcium, …
Green Crab Control: A Removal Effort In A Shallow Central California Estuary, Amy A. Larson, C. E. De Rivera, G. M. Ruiz, E. D. Grosholz, Mark D. Sytsma
Green Crab Control: A Removal Effort In A Shallow Central California Estuary, Amy A. Larson, C. E. De Rivera, G. M. Ruiz, E. D. Grosholz, Mark D. Sytsma
Environmental Science and Management Faculty Publications and Presentations
Goal: To test the feasibility and effects of locally removing a well-established population of a marine organism with pelagic larvae. Removal of adult European green crabs (Carcinus maenas) from Bodega Harbor as a model system to develop and inform management options for eradication, rapid response, and control of marine invaders.
Invasive Predator, Bythotrephes, Has Varied Effects On Ecosystem Function In Freshwater Lakes, Angela L. Strecker, Shelley E. Arnott
Invasive Predator, Bythotrephes, Has Varied Effects On Ecosystem Function In Freshwater Lakes, Angela L. Strecker, Shelley E. Arnott
Environmental Science and Management Faculty Publications and Presentations
Bythotrephes longimanus is an invertebrate predator that has invaded the North American Great Lakes and a number of inland lakes, where it preys on crustacean zooplankton. We examined the effect of Bythotrephes on two measures of ecosystem function during a four month observational study of freshwater lakes on the boreal shield. Bythotrephes-invaded lakes had significantly lower epilimnetic zooplankton abundance and production compared to reference lakes. On average, Bythotrephes consumed 34% ofzooplankton production when it was present in lakes. There was some evidence of changes in the timing of zooplankton production, as well as shifts to cooler, less productive habitats, which …