Water relations and physiological ecology of the salt marsh snail, Melampus bidentatus say

Price, Christopher H.

doi:10.1016/0022-0981(80)90069-6

Cited by 30 publications

(24 citation statements)

References 37 publications

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“…Os caramujos do gênero Melampus Montfort, 1810 respiram através do teto da cavidade do manto vascularizada, que funciona como um pulmão, mas ainda dependem da água para a reprodução (RUSSEL-HUNTER et al, 1972). Os adultos podem se afogar quando submersos por longos períodos (PRICE, 1980); portanto, indivíduos de M. coffeus sobem nas árvores do mangue com a chegada da maré alta, depois de se alimentarem no substrato durante a maré baixa (PROFFITT & DEVLIN, 2005).…”

unclassified

Avaliação de efeitos de espécies de mangue na distribuição de Melampus coffeus (Gastropoda, Ellobiidae) no Ceará, nordeste do Brasil

Maia

Tanaka

2007

Iheringia, Sér. Zool.

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ABSTRACT. Evaluation of local effects of mangrove species on the distribution of Melampus coffeus (Gastropoda, Ellobiidae) in Ceara, northeastern Brazil. Melampus coffeus (Linnaeus, 1758) is a pulmonate, macrodetritivore gastropod, important in energy flows in Neotropical mangroves, but its distribution in different spatial scales is still unknown in Brazil. The objective of this study was to evaluate the distribution of M. coffeus: 1) among the mangrove trees Rhizophora mangle Rhizophoraceae and Laguncularia racemosa Combretaceae; 2) in relation to the position of R. mangle prop roots and 3) among mangroves with different tree heights. Further, its behavior along one tidal cycle was also described. The densities of M. coffeus did not differ between R. mangle and L. racemosa, but the largest snails were found on R. mangle. The distribution of snails found on the sediment differed relative to the position of the prop roots, with the highest density in the center and largest size in the edge of the studied areas. However, this distribution was not related with the availability of food resources provided by decayed leaves. Higher densities were also recorded in intermediate and lowstature mangroves when compared with taller ones, but no differences in snail's sizes among mangroves were found. During the high tide, M. coffeus individuals climb nearby trees. These results are possibly related to the availability of resources and shelter supplied by R. mangle. Thus, studies on the distribution of M. coffeus in diverse conditions are essential, because mangroves are being intensively disturbed.KEYWORDS. Distribution, density, mangrove, northeastern Brazil, mollusc. RESUMO.Melampus coffeus (Linnaeus, 1758) é um gastrópode pulmonado, macrodetritívoro, importante na transferência de energia em manguezais neotropicais, mas sua distribuição em diferentes escalas espaciais ainda é pouco conhecida nas regiões brasileiras. Assim, o objetivo deste trabalho foi verificar a distribuição de M. coffeus com relação: 1) às espécies Rhizophora mangle Rhizophoraceae e Laguncularia racemosa Combretaceae; 2) à posição dos rizóforos de R. mangle e 3) à altura das árvores em diferentes manguezais. O seu comportamento ao longo do ciclo de marés também foi descrito. A densidade de M. coffeus foi similar entre R. mangle e L. racemosa, porém os maiores caramujos foram encontrados nas árvores de R. mangle. A distribuição dos caramujos encontrados no sedimento diferiu em relação aos rizóforos, com maior densidade no centro e o maior tamanho na borda da área amostral. Entretanto, não houve relação com a disponibilidade de recursos alimentares formados por folhas. A densidade também foi maior nos manguezais baixo e médio quando comparados ao alto, porém não foram encontradas diferenças de tamanho dos caramujos em mangues de alturas distintas. Observamos também que, durante a maré alta, M. coffeus sobe nas árvores mais próximas. Estes resultados podem estar relacionados principalmente com a disponibilidade de recursos e abrigos fornecidos por R. ma...

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Avaliação de efeitos de espécies de mangue na distribuição de Melampus coffeus (Gastropoda, Ellobiidae) no Ceará, nordeste do Brasil

Maia

Tanaka

2007

Iheringia, Sér. Zool.

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“…On the higher regions of the unimpounded marsh, it occurs with greatest frequency toward the upstream end of the tidal creek where Melampus also is most abundant. Peak abundances of these two mollusks may be related to low levels of predation (Vince and others 1976, Joyce and Weisberg 1986, Lin, 1989a, a high quantity/quality of food others 1988, Lin 1989b), and/or a favorable physical environment (Lent 1969, Price 1980, McMahon and Russell-Hunter 1981, Kraus and Crow 1985.…”

Section: Discussionmentioning

confidence: 98%

“…) Muhl (saltmeadow hay), Distichlis spicata (L.) Greene (spikegrass), andJuncas spp., as well as in well-drained regions dominated by stunted Spartina alterniflora Loisel. (saltwater cordgrass) (RusselHunter and others 1972, Price 1980, Hilbish 1981, Fell and others 1982, Joyce and Weisbcrg 1986. Similarly, Geukensicz is a major component of the macrobenthos inhabiting the lower elevations of salt marshes over much of the same geographical range as occupied by Melamp~s (Kuenzler 1961, RodriguezOrt6ga and Day 1978, Bertness 1984, Lin 1989b).…”

mentioning

confidence: 98%

Evaluation of tidal marsh restoration: Comparison of selected macroinvertebrate populations on a restored impounded valley marsh and an unimpounded valley marsh within the same salt marsh system in Connecticut, USA

Peck

Fell

Allen

et al. 1994

Environmental Management

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/ Macroinvertebrates were examined on an impounded valley marsh in Stonington, Connecticut, that has changed from a Typha-dominated system to one with typical salt-marsh vegetation during 13 years following the reintroduction of tidal exchange. Animal populations on this restored impounded marsh were evaluated by comparing them with populations on a nearby unimpounded valley marsh of roughly the same size.Populations of the high marsh snail, Melampus bidentatus Say, were quantitatively sampled along transects that extended from the water-marsh edge to the upland; those of the ribbed mussel, Geukensia demissa Dillwyn, were sampled in low marsh areas on transects along the banks of creeks and mosquito ditches. The occurrence of other marsh invertebrates also was documented, but their abundance was not measured. The mean density of Melampus was 332 + 39.6 SE/m 2 on the restored impounded marsh and 712 + 56.0 SE/m 2 on the unimpounded marsh. However, since snails were larger on the restored impounded marsh, the difference in snail biomass was less pronounced than the difference in snail density. Mean Melampus biomass was 4.96 +-0.52 SE g dry wt/m 2 on the restored impounded marsh and 6.96 -+ 0.52 SE g dry wt/m 2 on the unimpounded marsh. On the two marshes, snail density and biomass varied in relation to plant cover and other factors. The density and biomass of Geukensia at the edge of the marsh were comparable on the restored impounded and unimpounded marshes. Mean mussel densities ranged from 80 to 240/m 2 and mean mussel biomass varied from 24.8-64.8 g dry wt/m 2 in different low marsh areas. In contrast, below the impoundment dike, mean Geukensia density was 1100 -+ 96.4 SE/m 2 and mean Geukensia biomass was 303.6 +-33.28 SE g dry wt/m 2. A consideration of all available evidence leads to the conclusion that the impounded marsh is in an advanced phase of restoration.Although there is a high concentration of coastal marsh restoration and creation sites in the northeastern United States, less research has been devoted to such activities in that region compared to the midAtlantic, Florida, Gulf of Mexico, and Pacific coasts (Shisler 1990). Furthermore, research on marsh restoration has tended not to include detailed studies of macroinvertebrates, even though some of these ani-

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“…While M. bidentatus have been shown to be highly tolerant to desiccation (Price, 1980), they are poor regulators of body water (Russell-Hunter and Meadows, 1965;Price, 1976;1980) and there is no available information regarding the osmoregulatory capabilities of the species.…”

Section: Discussionmentioning

confidence: 98%

Osmotic Balance in a Marine Pulmonate,Amphibola crenata

Shumway

Freeman

1984

Marine Behaviour and Physiology

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The pulmonate mud-snail Amphibola crenata is an osmoconformer in 25%-125% sea water, its haemolymph being slightly hyperosmotic and hyperionic to the medium. It maintains its haemolymph markedly hyperosmotic in media below 25% sea water and in freshwater, in which it survives for a week or longer. On exposure to dilute or concentrated media, water which enters or leaves the tissues preferentially enters or leaves the cells. Regulation of cell volume towards initial values is accomplished within 5 days. Measurements of changes in cell volume, and of distribution of tissue water between the intracellular and extracellular compartments, in snails moved from 100% sea water into dilute or concentrated media, and in snails moved back to 100% sea water, indicate that mechanisms of cell volume regulation are minimal in ca 60-65% sea water. Changes in the concentration of tissue free amino acids are in accord with current theories of mechanisms of isosmotic intracellular regulation. The results are discussed in the light of the taxonomic, evolutionary and ecological status of Amphibola as a shore-living, primitive, marine representative of a predominantly terrestrial and freshwater group of gastropod molluscs.

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Water relations and physiological ecology of the salt marsh snail, Melampus bidentatus say

Cited by 30 publications

References 37 publications

Avaliação de efeitos de espécies de mangue na distribuição de Melampus coffeus (Gastropoda, Ellobiidae) no Ceará, nordeste do Brasil

Avaliação de efeitos de espécies de mangue na distribuição de Melampus coffeus (Gastropoda, Ellobiidae) no Ceará, nordeste do Brasil

Evaluation of tidal marsh restoration: Comparison of selected macroinvertebrate populations on a restored impounded valley marsh and an unimpounded valley marsh within the same salt marsh system in Connecticut, USA

Osmotic Balance in a Marine Pulmonate,Amphibola crenata

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