Aquatic macroinvertebrates in lentic bodies Maya Region, Guatemala.
Keywords:
water quality, bioindicators, lentic, community, physicochemicalAbstract
Abstract
The composition of aquatic macroinvertebrate community has been used to determine the ecologicalstatus of lentic ecosystems in many water quality studies. In this study, the community structure ofthe aquatic macroinvertebrates was surveyed in seven lentic bodies (Yaxhá, Sacnab, Petenchel,Quexil, Salpetén, Macanche y Sacpuy) located in the Mayan region in northern Guatemala. At eachsampling site a maximum of six sampling stations were set and macroinvertebrate samples werecollected with an Ekman dredge. In addition, measurements of the following physicochemicalvariables were taken: dissolved oxygen, temperature, pH, salinity, conductivity, total dissolved solids,nutrients, sulfate and depth. A total species richness of 38 taxa was found, Odonata, Coleoptera,Trichoptera and Ephemeroptera were the most diverse orders. Species diversity was high in placeswhere there is no anthropogenic influence and tended to decrease as some human disturbance wasobserved. The distribution of aquatic macroinvertebrates was influenced by the type of substrate andphysicochemical changes.
Key words:
water quality, bioindicators, lentic, community, physicochemical
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VOL. 23 No 1 REVISTA CIENTÍFICA
AÑO 2013
INSTITUTO DE INVESTIGACIONES QUÍMICAS Y BIOLÓGICAS
FACULTAD DE CIENCIAS QUÍMICAS Y FARMACIA
UNIVERSIDAD DE SAN CARLOS DE GUATEMALA
