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dc.contributor.authorOstrofsky, Milton L.
dc.contributor.authorJohnson, R.K.
dc.date.accessioned2017-04-06T15:48:01Z
dc.date.available2017-04-06T15:48:01Z
dc.date.issued2004-10
dc.identifier.citationJohnson, R.K., and Ostrofsky, M.L. (2004). Effects of sediment nutrients and depth on small-scale spatial heterogeneity of submersed macrophyte communities... Canadian Journal of Fisheries and Aquatic Sciences 61(1): 1-10. doi: 10.1139/F04-081en_US
dc.identifier.issn0706-652X
dc.identifier.issn1205-7533
dc.identifier.urihttp://hdl.handle.net/10456/42614
dc.description.abstractSediment concentrations of total and available nitrogen (N), phosphorus (P), and potassium (K) and organic matter from the littoral zone of Lake Pleasant, Pennsylvania, were highly variable. Only organic matter and total N were correlated with depth, however. This result suggests the existence of more complex environmental gradients than the prevailing paradigm of monotonic changes in sediment characteristics with increasing depth. The spatial heterogeneity of submersed aquatic plant communities was significantly correlated with depth, and available N and P. Canonical correspondence analysis demonstrated that these three factors explained 38% of the variance in community structure. Other sediment characteristics (available K, organic matter, and total N, P and K) were not significant by themselves, but all variables combined explained 63% of community-structure variance. Cluster analysis identified species or groups of species typical of endpoints on the depth versus nutrient axes. Myriophyllum exalbescens was typical of deep sites with relatively nutrient-rich sediments, whereas deep nutrient-poor sites were dominated by Vallisneria americana and Megalodonta beckii. Shallow nutrient-rich sites were dominated by several species of Potamogeton and Elodea canadensis, and shallow nutrient-poor sites were dominated by Heteranthera dubia and Najas flexilis. These results demonstrate the importance of sediment characteristics in determining macrophytes’ community structure within lakes.en_US
dc.language.isoen_USen_US
dc.publisherNRC Canadaen_US
dc.relation.ispartofCanadian Journal of Fisheries and Aquatic Sciencesen_US
dc.relation.isversionofhttp://www.nrcresearchpress.com/doi/abs/10.1139/f04-081#.WOZhVfnytQIen_US
dc.rightsAuthor can place post-print on individual page or institutional repository. Copyright remains with the publisher. Please contact author or publisher for rules on further usage.en_US
dc.subjectsedimenten_US
dc.subjectmacrophyte communitiesen_US
dc.subjectLake Pleasanten_US
dc.titleEffects of sediment nutrients and depth on small-scale spatial heterogeneity of submersed macrophyte communities...en_US
dc.description.versionFinal manuscript post peer review, without publisher's formatting or copy editing (postprint)en_US
dc.contributor.departmentBiologyen_US
dc.citation.volume61en_US
dc.citation.issue1en_US
dc.citation.spage1en_US
dc.citation.epage10en_US
dc.identifier.doi10.1139/F04-081
dc.contributor.avlauthorOstrofsky, Milton L.


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