Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Document 8406096
Document related concepts
Transcript
Ciencias Marinas ISSN: 0185-3880 [email protected] Universidad Autónoma de Baja California México Spinelli, Mariela L; Gonçalves, Rodrigo J; Villafañe, Virginia E; Capitanio, Fabiana L Diversity of copepods in Atlantic Patagonian coastal waters throughout an annual cycle Ciencias Marinas, vol. 42, núm. 1, 2016, pp. 31-47 Universidad Autónoma de Baja California Ensenada, México Available in: http://www.redalyc.org/articulo.oa?id=48044829003 Abstract The aim of this study is to an alyze the annual zooplankton suc cession at a coastal station in Patagonia (Argentina), with spe cial emphasis on copepods and their pot ential preys, using solar rad iation and temperature as envir onmental factors. The annual pla nkton cycle exhibited autumn/winter and spri ng/summer phases. During the au tumn/winter phase, low temperature and radiation were correlate d with higher diatom abundance and cope pod diversity. This period was characterized by a dominant classical herbivorous food web in w hich the large copepod Calanoides carinatus dominated the community. On the contrary, during the spring/su mmer period, with high radiation and temperature levels, flagellates were the dominant food availabl e for zooplankton and correlated with smaller species of copepo ds such as the harpacticoid Euterpina acutifrons . Also, intensive reproduction of the small copepods E. acutifrons and Paracalanus parvus occurred mainly in summer. On the other hand, high species diversity was found in winter when the ultraviolet radi ation was low. The temporal pat tern of the copepods observed in our study was explained by food availabili ty and environmental factors (tem perature and solar radiation), although other factors such as predator abundance may also be important in mod ulating the community. Our result s show the importance of copep od abundance dynamics and highlights their key role in the pelagic food web in northern Pa tagonian coastal waters. Keywords Zooplankton, harpact icoid copepods, Argent inean Sea, phytopla nkton. How to cite Complete issue More information about this article Journal's homepage in redalyc.org Scientific Information System Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Non-profit academic project, developed under the open access initiative
