21 results for Nitellopsis obtusa (starry stonewort)

Impact ID Scientific Name Impact Type Study Type Study Location Impact Description Geographic Location Reference
3996 Nitellopsis obtusa Habitat Alteration Experimental Field Macrophyte biomass is lower when starry stonewort (Nitellopsis obtusa) is abundant. Onondaga and Cortland Counties, New York, USA 29177
4001 Nitellopsis obtusa Habitat Alteration Observational Field Starry stonewort (Nitellopsis obtusa) forms thick mats that can completely cover the substrate. Michigan, USA 19736
4002 Nitellopsis obtusa Habitat Alteration Observational Field Starry stonewort (Nitellopsis obtusa) becomes dense and forms “pillows” of biomass at various heights. Michigan, USA 19736
4006 Nitellopsis obtusa Habitat Alteration Observational Field When starry stonewort (Nitellopsis obtusa) dominates, biomass of all other competing species declines significantly. Michigan, USA 19736
4011 Nitellopsis obtusa Habitat Alteration Observational Field Starry stonewort (Nitellopsis obtusa) acts as a favorable substrate for zebra mussels (Dreissena polymorpha). Michigan, USA 19736
4014 Nitellopsis obtusa Habitat Alteration Observational Field Starry stonewort (Nitellopsis obtusa) impacts fish spawning by creating a physical barrier and restricting access to substrates used as nesting habitat. This reduces the nesting area, density of nests, and can lead to the elimination of spawning altogether in highly infested areas. Michigan, USA 19736
4016 Nitellopsis obtusa Habitat Alteration Observational Field Because of its mat-forming growth strategy, starry stonewort (Nitellopsis obtusa) abundance reduces structural complexity and stem density of the aquatic environment, which could result in reduction of important habitat for juvenile fish species. Michigan, USA 19736
4018 Nitellopsis obtusa Habitat Alteration Observational Field Zooplankton species may shift from pelagic communities to littoral communities in the presence of starry stonewort (Nitellopsis obtusa). Michigan, USA 19736
4021 Nitellopsis obtusa Habitat Alteration Anecdotal Field In its introduced range, starry stonewort (Nitellopsis obtusa) peaks in biomass in late fall/early winter after much of the other local vegetation has subsided. Thus, starry stonewort (Nitellopsis obtusa) could provide an important source of food and habitat for overwintering species. St. Lawrence River, Detroit River System, USA 35575
4026 Nitellopsis obtusa Habitat Alteration Experimental Field At shallow water depths, starry stonewort (Nitellopsis obtusa) can fill the water column and limit light attenuation to native species. Great Lakes Region, USA 35682
4560 Nitellopsis obtusa Habitat Alteration Anecdotal N/A causes critical habitat loss Great Lakes 36858
4561 Nitellopsis obtusa Habitat Alteration Anecdotal N/A Loss of access to critical fish spawning areas just as inland lake water temperatures become suitable (45°-50°F) for bluegill and largemouth bass spawning Great Lakes 36861
4562 Nitellopsis obtusa Habitat Alteration Anecdotal N/A Nitellopsis causes loss of access to critical coarse woody habitat by growing over submerged snags and woody debris Great Lakes 36861
4565 Nitellopsis obtusa Habitat Alteration Anecdotal N/A Nitellopsis obtusa eliminates optimal growth habitat for fish fry Great Lakes 36861
4566 Nitellopsis obtusa Habitat Alteration Anecdotal N/A dense aquatic meadows of Nitellopsis obtusa eliminate or signficantly reduce vertical habitat structural complexity Great Lakes 36861
4567 Nitellopsis obtusa Habitat Alteration Anecdotal N/A Dense meadows of Starry Stonewort are capable of complete collapse in shallow areas when surface water temperatures reach = 86°F (30°C) - this may create seasonal 'dead zones' Great Lakes 36861
4570 Nitellopsis obtusa Habitat Alteration Observational Field the normal underwater 'forest like' structure which provides refuge, shelter and nursery space for minnows and warm-water fishes is being replaced by thick aggregations Lake Simcoe 36862
4571 Nitellopsis obtusa Habitat Alteration Anecdotal N/A rock bass, smallmouth bass, largemouth bass, bluegill, and pumpkinseed avoid areas with starry stonewort present Lake Simcoe 36862
4572 Nitellopsis obtusa Habitat Alteration Anecdotal N/A fish such as walleye, muskellunge, and pickerel that hide within plant areas and rely on ambush predation may switch to a chase hunting strategy in more open areas at a higher cost of energy Lake Simcoe 36862
4573 Nitellopsis obtusa Habitat Alteration Anecdotal N/A starry stonewort may lead to increased cyanobacterial growth, and more potentially toxic blooms, likely caused by anoxic release of sediment-bound P under dense aggregations Lake Simcoe 36862
7550 Nitellopsis obtusa Habitat Alteration Observational Field In Lake Majcz Wielki, Poland, zebra mussels settle at densities of 1000 per m2 on Nitellopsis obtusa, and at much lower densities on other plants. Lake Majcz Wielki, Poland 17614

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