The distribution of three uncommon freshwater gastropods in the drainage ditches of British grazing marshes

Watson, Alisa M.; Ormerod, Stephen James

doi:10.1016/j.biocon.2003.09.021

Cited by 46 publications

(37 citation statements)

References 18 publications

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“…availability (as in WCA1 water) contributed to slow growth but it may have also slowed the repair of erosion caused by low pH. Vermeij (1993) described the need for sufficient Ca 2? to support shell repair throughout a snail's lifetime.…”

Section: Discussionmentioning

confidence: 97%

The effect of calcium and pH on Florida apple snail, Pomacea paludosa (Gastropoda: Ampullariidae), shell growth and crush weight

Glass

Darby

2008

Aquat Ecol

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Pomacea (Ampullariidae) snails, commonly referred to as apple snails, serve as prey for many freshwater-dependent predators, and some species are highly invasive. Identifying limits to apple snail distribution and abundance are pertinent to understanding their ecology. Calcium (Ca 2? ) availability and pH generally influences freshwater snail populations, yet scant data exist for Pomacea snails. We measured 6-week change in shell length (DSL) in P. paludosa in two laboratory experiments with varying Ca 2? and pH levels. DSL was significantly higher in C28 mg Ca 2? /l compared with treatments B14 mg/l. Snails from populations living in low Ca 2? /pH waters did not appear genetically predisposed at growing faster in these conditions. Smallest DSL was in snails treated with 3.6 mg Ca 2? /l and pH \ 6.5 water; these snails had signs of shell erosion. Shell crush weights (CWs) were lowest for snails grown in the lowest Ca 2? /pH treatment. Smaller shells and lower CWs have implications for predation vulnerability and reproductive success. Our results are consistent with reports associating relatively low snail densities with relatively low Ca 2? /pH waters, and they are consistent with the geographic distribution of P. paludosa as related to the underlying water chemistry as influenced by geology.

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Section: Discussionmentioning

confidence: 97%

The effect of calcium and pH on Florida apple snail, Pomacea paludosa (Gastropoda: Ampullariidae), shell growth and crush weight

Glass

Darby

2008

Aquat Ecol

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“…Studies of their prevalence are largely restricted to describing new sites of its occurrence in specified regions (Beran & Glöer 2006;Glöer & Pesic 2007;Glöer & Nasser 2007;Glöer & Rähle 2009) and its contribution to the biology and ecology of threatened species like, e.g., Anisus vorticulus (Troschel, 1834) (Terrier et al 2006;Glöer & Groh 2007) and other species (Olsson 1988;Watson & Ormerod 2004) as well as to planorbid taxonomy (Jørgensen et al 2004;Glöer & Bouzid 2008;Glöer & Meier-Brook 2008). Because of the small size of G. crista and its scarce distribution, little information is available concerning its life Table 3.…”

Section: Discussionmentioning

confidence: 99%

Occurrence and morphological variability of Gyraulus crista (Gastropoda: Pulmonata: Planorbidae) on different types of substratum in woodland ponds

Spyra

Strzelec

2013

Biologia

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Gyraulus crista is often a dominant component of lentic freshwater snail communities because it may occur in densities of hundreds of individuals/m 2 across continents and in lentic water types. A study on the occurrence and conchological variability of the shell of G. crista was carried out on five different types of substrates in the anthropogenic woodland ponds at thirteen study sites. In order to answer the question of whether the existence of this species in different forms is affected by the quality of the inhabited substrates, various physico-chemical properties of the water, different bottom sediments and water level fluctuations, we examined the variation of forms across 5990 specimens of G. crista in woodland ponds. This research, which was supported by Redundancy Analysis (RDA), showed a highly significant association of G. c. spinulosus with leaf deposits and G. c. cristatus for T. latifolia remains. G. crista nautileus was mainly associated with T. latifolia and also with G. aquatica remains. They also showed no statistically significant relationship between the occurrence of particular conchological G. crista forms and different physico-chemical properties of water.

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“…Based on numerous malacological field studies conducted during the past two decades (Fechter and Falkner, 1990;Patzner, 1994Patzner, , 1995Gundacker, 2000;Denadai et al, 2001;Glöer and Meier-Brook, 2003;Sturm, 2004;Watson and Ormerod, 2004), freshwater molluscs may be regarded as preferential indicator organisms that play an essential role concerning the characterization of biotope structures and the evaluation of water quality in rivers and brooks. According to the current knowledge, many species of this group exhibit a considerable sensitiveness to any changes of their environment, causing their disappearance within a rather short period of time and, on the other side, their fast dispersal if they are better adapted to the new environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Aquatic molluscs in high mountain lakes of the Eastern Alps (Austria): Species-environment relationships and specific colonization behaviour

Sturm¹

2012

Chin. J. Ocean. Limnol.

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Mountain lakes represent essential stages for aquatic species on their way colonizing habitats of more elevated regions. Despite extensive biological and chemical study, only little has been reported about the species number and density of freshwater molluscs in these waters. The article presented here elucidates the dispersal of aquatic gastropods and bivalves in 12 mountain lakes that are commonly situated in the Eastern Alps, Austria. Molluscs were recorded at 120 sample points, where a total of 13 species (8 gastropods and 5 bivalves) could be determined. Species distribution data as well as results from contemporarily conducted physico-chemical factor recording were subject to weighted average analysis. In addition, a global marginality coefficient indicating the particularity of a habitat inhabited by a focal species as well as a global tolerance coefficient expressing the width of a niche occupied by this species were computed. Species-environment relationships exhibited that species number and specific density decrease with increasing geographic altitude, declining water temperature, and decreasing amount of submerged vegetation. Whilst waters of the montane altitude level are partly charcterized by high number of mollusc species (> 10), lakes of the subalpine altitude level commonly bear 1 or 2 species with <<1 ind./m 2 . As proposed by the results of statistics, 9 of the 13 mollusc species are characterized by a pronounced behaviour as specialists with respect to most environmental factors. The four remaining species, Pisidium casertanum, Galba truncatula, Radix labiata, and Radix balthica, act as generalists which increases their pioneering role in the long-term occupation of the Central-alpine region.

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The distribution of three uncommon freshwater gastropods in the drainage ditches of British grazing marshes

Cited by 46 publications

References 18 publications

The effect of calcium and pH on Florida apple snail, Pomacea paludosa (Gastropoda: Ampullariidae), shell growth and crush weight

The effect of calcium and pH on Florida apple snail, Pomacea paludosa (Gastropoda: Ampullariidae), shell growth and crush weight

Occurrence and morphological variability of Gyraulus crista (Gastropoda: Pulmonata: Planorbidae) on different types of substratum in woodland ponds

Aquatic molluscs in high mountain lakes of the Eastern Alps (Austria): Species-environment relationships and specific colonization behaviour

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