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dc.contributor.advisorSantos-Flores, Carlos J.
dc.contributor.authorEscobar-Ramos, Paola M.
dc.description.abstractFour communities of aquatic macroinvertebrates were evaluated, two reference streams, Cupeyes River and La Olimpia Quebrada, and two impaired streams Guanajibo and Rosario Rivers. Drifting organism and those from leaf packs, rocks and riparian vegetation were collected. The communities were dominated by insects in the orders Ephemeroptera (F. taino), Diptera (Chironomidae), and Trichoptera (P. pulchrus y H. minima) as well as non insects such as gastropods (M. tuberculata). With respect to habitat type no significant differences in abundances were found. However we observed that leaf packs supported more individuals and, were more similar in taxa when compared to other microenvironments. Futhermore hydroperiods affected abundance. The reference streams shared taxa sensitive to pollution (Blepharicera sp.), organisms indicator of enrichment by organic matter (Hyallela sp.) and differences in the presence such as Hagenulus sp. Neohagenulus sp. and B. carmencita. The biological quality of the rivers was that of unaltered water, criterion that should be reevaluated in function of biological features of the groups of macroinvertebrates collected.en_US
dc.subjectMacroinvertebrados acuáticosen_US
dc.subjectEphemeroptera (F. taino)en_US
dc.subjectDiptera (Chironomida)en_US
dc.subjectTrichoptera (P. pulchrus y H. minima)en_US
dc.subjectGasteropoda (M. tuberculata)en_US
dc.subject.lcshFreshwater invertebrates--Puerto Rico.en_US
dc.subject.lcshAquatic invertebrates--Puerto Rico.en_US
dc.titleComunidad de macroinvertebrados acuáticos y la calidad biológica de cuatro ríos de Puerto Ricoen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2010 Paola Milena Escobar Ramosen_US
dc.contributor.committeeThaxton, Jarrod
dc.contributor.committeeAcosta Martínez, Jaime
dc.contributor.representativeGoyal, Megh
dc.contributor.collegeCollege of Arts and Sciences - Sciencesen_US
dc.contributor.departmentDepartment of Biologyen_US

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