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A revision of the local species of sipunculans is performed for the first time.
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The isoenzymes and soluble protein of the local species are all polymorphic.
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One of the plausible mechanisms that maintain species distinctiveness, or limit hybridization, is the existence of local species-specific preferences for the natal habitat type.
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These differences are caused by the correlation of spawning periods of local species of different zoogeographical origin with the different water temperatures.
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Local species composition was similar to that in Chesapeake Bay, and dominant species occurred in estuaries throughout the Mid-Atlantic Bight.
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In well-established subtidal assemblages, numbers of NIS were 1.5-2.5 times greater on pontoons or pilings than on rocky reefs, despite the local species pool of natives being up to 2.5 times greater than that of NIS.
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The effects of P on inoculum production by local species compared with those collected from other states showed the superiority of the local culture.
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Weather records, developmental data and degree day accumulations, together with a knowledge of local species and their habitats, allowed determination of the time since death.
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This suggests basic similarities in very local species packing despite observed spatial and temporal variation in valley-wide diversities.
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This suggests that other mechanisms must account for the maintenance of local species diversity.
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Local species abundance and altitudinal range occupied accounted for much of the variation in species distribution.
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The local species richness of four different grassland fields fell an average of 37% during a 1988 drought that decreased above-ground living plant mass by an average of 47%.
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Despite the return to more normal plant mass and precipitation during the next two years, there was no significant recovery in species richness in the 46 permanent plots, suggesting that local species richness became recruitment limited.
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Persistence appeared to be related more to patterns of emigration and immigration in response to climatic conditions (i.e., drought) in the southern prairies than to local species richness, wetland habitat variability or productivity.
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Kangaroo rat mounds created disturbance gaps and contributed to local species diversity by creating microhabitats that supported unique plant communities.
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We suggest that drought-wet cycles periodically reverse the dominance of the two species of Ctenophorus, and perhaps of other lizard species also, thus enhancing local species diversity over time.
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Again we find that, within a single trophic level, most mathematical models predict saturation of ecosystem function at a low proportion of local species richness.
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However, our results show that the identity of the local species matters.
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For unicellular organisms, a lack of effects of local species richness on ecosystem function has been proposed due to their locally high species richness and their ubiquitous distribution.
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We found higher local species richness compared to the global species pool for unicellular organisms than for metazoan taxa.
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