Structure, dynamics and production of the benthic fauna in Lake Manitoba

Tudorancea, Claudiu; Green, Roger H.; Huebner, Judith D.

doi:10.1007/bf00015452

Cited by 30 publications

(8 citation statements)

References 45 publications

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“…The highest values were found at the deep stations in lakes Zwai and Awassa (21% and 31 y0 respectively). Our organic content values are a little higher than those found in some lakes in the temperate region (McLachlan, 1974;Tudorancea et al, 1979). The non-saline lakes have a littoral belt of emergent and submergent vegetation, which usually extends offshore down to 2 or 3 m depth.…”

Section: Lakementioning

confidence: 70%

Associations and distribution of benthic nematodes in the Ethiopian Rift Valley lakes

Tudorancea

Zullini

1989

Hydrobiologia

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The nematode associations in six Ethiopian rift lakes, one man-made lake, and three crater lakes were studied and related to water conductivity, lake depth and sediment particle size. The lakes investigated lie at moderate altitudes (1200-2000 m), are alkaline and vary in their conductivities. The rift lakes Abijata and Shala and the crater lakes Aranguadi, Kilotes and Chitu are soda lakes (K,, > 6000 PS cm-*), while the remaining five lakes and the man-made Lake Koka are within the freshwater range of conductivity (K,, < 6000 PS cm -').A total of 16 species were identified including six new species. The nematode associations varied between lakes and were restricted to very few species in each lake. Most nematodes were restricted to non-saline lakes. The most dilute L. Zwai had a higher number of nematode species (12) and abundance than other lakes. The saline lakes Shala and Kilotes had nematode assemblages made up of only a single species (Mesodorylaimus macrospiculum). No nematodes were found in the hypersaline crater L. Chitu. Tobrilus aficanus appeared more euryhaline than other nematodes occurring at conductivities as high as 15 000 PS cm -' (L. Abijata). Five of the most common species (Dolylaimus sp., Monhystera stagnalis, Aphanolaimus tudoranceai, Tobrilus africanus and Actinolaimus perplexus) were associated with medium grained sand. A monthly variation in density of nematodes in L. Zwai is also shown.

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Section: Lakementioning

confidence: 70%

Associations and distribution of benthic nematodes in the Ethiopian Rift Valley lakes

Tudorancea

Zullini

1989

Hydrobiologia

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“…The volumes of subsamples were determined in such a way as to include at least 150 individuals of the most abundant taxonomic groups. Individual invertebrate dry weights were estimated from published lengthweight equations (Burky, 1971;Eckblad, 1971;Dumont et al, 1975;Mason, 1977;Tudorancea et al. 1979;Smock 1980;Rosen, 1981;Peters and Downing, 1984;Burgherr and Meyer, 1997;Benke et al, 1999).…”

Section: Study Sitementioning

confidence: 99%

Invertebrate communities and epiphytic biomass associated with metaphyton and emergent and submerged macrophytes in a large river

et al. 2007

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The contribution of metaphyton and submerged and emergent macrophytes as support to phytophilous organisms was compared from the standpoint of epiphytic chlorophyll and of invertebrate biomass, taxonomic composition and size distribution. This study was carried out in a fluvial lake of the St. Lawrence River (Lac Saint-Pierre, QuØbec) at 5 sites with chemically and physically distinct water masses. Invertebrate and epiphyton biomass were consistently higher in complex filamentous mats (overall mean: 61 AE 5 [SE] mg and 124 AE 18 mg Chl a /g vegetation dry mass, respectively) and submerged plants (overall mean: 48 AE 7 mg and 195 AE 56 mg Chl a /g vegetation d.m.) than in the simple emergent stems (overall mean: 4 AE 1 mg and 45 AE 15 mg Chl a /g vegetation d.m.). Taxonomic composition of the invertebrate communities varied largely among types of vegetation and sites. Sampling site (and hence water physical and chemical characteristics) explained a larger fraction of the variation in invertebrate composition (28 %) than vegetation type (9 %). Overall, metaphyton hosted an invertebrate fauna more abundant and more diverse, with larger organisms and more semi-aquatic taxa, than that of nearby vascular macrophytes. However, at the scale of this river segment (~300 km 2 ), metaphyton contributed < 1 % to total phytophilous invertebrate biomass compared to 96 % and 4 % for submerged and emergent plants, respectively. In the river trophic network, vascular plants thus appear to support the bulk of the food supply, which is periodically enriched and diversified by the appearance of metaphyton blooms.

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“…Energy flow through benthic communities has been especially poorly investigated, because methodological problems make even such simple quantities as population size and biomass frustratingly difficult to estimate accurately. In particular, most published studies on energy flow in the lacustrine zoobenthos deal only with the macrofauna (i.e., animals large enough to be retained on a screen of :::::0.5-mm mesh) (e.g., Johnson and Brinkhurst 1971a, b, Jonasson 1972, Mason 1977, Tudorancea et al 1979. However, there is now ample evidence from marine studies that the meiofauna (all metazoans that pass through :::::0.5-mm screens) may be of considerable importance in benthic energetics (e.g., Gerlach 1971, Vernberg and Coull 1974, Lasserre et al 1975, Warwick et al 1979, Dye 1983, Rudnick et al 1985, and recent studies from freshwater habitats suggest that the meiofauna may play a similarly important role in lake and stream ecosystems (Holopainen and Paasivirta 1977, Hummon 1981, Nalepa and Quigley 1983.…”

Section: Introductionmentioning

confidence: 99%

An Energy Budget for the Zoobenthos of Mirror Lake, New Hampshire

Strayer¹,

Likens²

1986

Ecology

107

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.Wiley is collaborating with JSTOR to digitize, preserve and extend access to Ecology Abstract. We combined our data on abundance, biomass, and diet of benthic animals in Mirror Lake with estimates of annual P/B (production/biomass) ratios to construct a model of energy flow through the zoobenthos of this small, oligotrophic lake. Because we included the rarely studied meiofauna (all metazoans < 0.5 mm), our model provides the first accounting of energy flow through an entire zoobenthic community in freshwater. In Mirror Lake, about half of the zoobenthic assimilation of carbon (14 g m-2-yr-') is due to the meiofauna. Although detritivory supports about half of community assimilation, benthic algae are an important energy source to the zoobenthos, especially in the littoral zone. We suggest that the importance of benthic algae in lacustrine energy budgets has been underestimated. Major fates of zoobenthic production in Mirror Lake include invertebrate predation, insect emergence, and fish predation. Invertebrate predation is the dominant fate and accounts for 80% of zoobenthic production.

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Structure, dynamics and production of the benthic fauna in Lake Manitoba

Cited by 30 publications

References 45 publications

Associations and distribution of benthic nematodes in the Ethiopian Rift Valley lakes

Associations and distribution of benthic nematodes in the Ethiopian Rift Valley lakes

Invertebrate communities and epiphytic biomass associated with metaphyton and emergent and submerged macrophytes in a large river

An Energy Budget for the Zoobenthos of Mirror Lake, New Hampshire

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