The New Zealand freshwater mudsnails (Potamopyrgus antipo...
“The New Zealand freshwater mudsnails (Potamopyrgus antipodarum) is a primary consumer and resides in trophic level 2 of the food chain. Mudsnails are grazers and feed on mainly photosynthetic organisms such as algae found on rocks and other submerged surfaces. As these food sources are photosynthetic organisms, mudsnails are most abundant in areas where algae can grow in substrates exposed to mild sunlight. Mudsnails can tolerate a wide range of temperatures ranging from 0° to roughly 34°, preferably 8 - 8.5 ppm of dissolved oxygen but are able to survive in conditions as low as 5 ppm, mudsnails are also tolerable to high turbidity. However they are sensitive to pH favouring neutral but can tolerate mild acidity. As a result of mudsnails reliance on algae for food resources they are more likely to occur in areas of the stream that have enough sunlight to provide their main food source thus they can survive wherever suitable food sources are available. Mudsnails would be more abundant in environments that provide suitable substrate like rocks and gravel because they offer surfaces for algae growth and attachment. Mudsnails' abundance may decrease within areas that limit algae growth in places that are shaded and offer low light availability, reducing their food supply. Extreme acidic water conditions may also decrease mudsnails' abundance and reduce their survival because mudsnails are highly sensitive to pH changes. Extremely low dissolved oxygen levels could limit their ability to respire, however major habitat disturbances such as pollution or human modification within their habitat may reduce suitable surfaces for feeding or shelter. Mudsnails ability to occupy different zones is a result of adaptations that allow them to tolerate a wide range of environmental conditions. Their ability to tolerate and survive in wide temperature ranges and higher turbidity enables them to persist in areas affected by changing stream conditions”
Summary
Potamopyrgus antipodarum is indeed a primary consumer (trophic level 2) that grazes on algae and other biofilm and can tolerate a wide range of temperatures, turbidity and low dissolved‑oxygen conditions. However, studies show it often thrives in shaded, disturbed habitats and its abundance is not strictly tied to sunlight‑driven algal growth, and precise DO (8‑8.5 ppm) and pH thresholds are not well documented. Consequently, the statement’s general traits are correct, but the specific claims about light preference and exact oxygen/pH limits are not fully supported.
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- Potamopyrgus antipodarum has the potential to detect effects from various land use activities on a freshwater ecosystem - ScienceDirect
Among experimental animals, molluscs have a prominent place in field studies because they are the second largest phylum, have a global distribution, are abundant in freshwater and marine environments, and have various ecological roles (e.g., as a food source, provides habitat and protection) in the ecosystem (Canesi et al., 2012; Funes et al., 2006). Potamopyrgus antipodarum is known to be tolerant to environmental variables (Alonso and Castro-Díez, 2008) but considered a sensitive species for toxicity testing (Collado, 2016; Jobling et al., 2003; Mazurová et al., 2008).
- Potamopyrgus Antipodarum - an overview | ScienceDirect Topics
Potamopyrgus antipodarum, commonly known as the New Zealand mud snail, is a small invasive species that can reach high population densities and impacts benthic communities, thriving in various habitats due to its rapid reproduction, generalist feeding habits, and high dispersal rates.
- Globally invasive Potamopyrgus antipodarum (Gray, 1843) – an indicator of the degraded water systems in relation to native aquatic invertebrates - ScienceDirect
The research aims were to determine the extent of invasion in anthropogenically impacted habitats and the relationship between the abundance of aquatic invertebrates and oxygen concentration, pH, N-NO2, N-NO3, chlorides, and ammonia. This investigation helps elucidate the potential of invader to adapt to adverse environmental conditions in aquatic systems in which it was found dominant. The abundance of P. antipodarum showed an unimodal distribution, being higher in disturbed conditions.
- Potamopyrgus antipodarum has the potential to detect ...
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- The snail Potamopyrgus antipodarum grows faster and is more active in the shade, independent of food quality - PubMed
Ecological stoichiometry has advanced food web ecology by emphasising the importance of food quality over food quantity for herbivores. Here, we focus on the effects of abiotic factors such as nutrients and light (known to influence food quality) on grazer growth rates. As model organism we used the mudsnail Potamopyrgus antipodarum that is native to New Zealand but invasive elsewhere.
- New Zealand Mudsnail (Potamopyrgus antipodarum) ERSS
U.S., P. antipodarum reaches densities of 300,000 snails m2 and alters nutrient (nitrogen and · carbon) flows, consumes large amounts of GPP, accounts for most of the invertebrate production ... and negatively influence higher trophic levels.
- PWD LF K0700-0610C (06/13) THE CREEK CAFÉ OBJECTIVE:
trophic level that eat the plants (herbivores) are described as primary consumers.
- Indicators: Zooplankton | US EPA
Zooplankton are small, free-floating aquatic microorganisms including crustaceans, rotifers, open water insect larvae, and aquatic mites. The zooplankton community is composed of both primary consumers and secondary consumers.
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