Influence of land use on hyporheos in catchment streams of the Velka Fatra Mts |
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Authors: | Marta Illyová Pavel Beracko I?ja Krno |
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Institution: | (1) “Emil Racovitza” Institute of Speleology, Romanian Academy, Clinicilor 5, 400006 Cluj-Napoca, Romania;(2) Faculty of Biology and Geology, “Babeş-Bolyai” University, Cluj-Napoca, Romania;(3) Romanian Waters National Administration, Someş Tisa Division, Cluj-Napoca, Romania;(4) National Institute of Research and Development for Optoelectronics, Research Institute for Analytical Instrumentation, Bucharest, Romania;(5) “Emil Racovitza” Institute of Speleology, Romanian Academy, Bucureşti, Romania |
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Abstract: | The historical influence of landscape on the quantitative variables and a special group of hyporheos in streams with similar
origin but different catchment landscapes and forest management was studied. The study was conducted in two streams: (i) a
preserved forested natural stream where critical ecosystem processes were unaltered by human activities and (ii) a stream
with the strong anthropogenic stressors (e.g., logging, agriculture, pasture), impacting the system for the last 500 years.
Some parameters were strongly related to these land use: conductivity, fine benthic organic matter (FBOM), orthophosphate
(P_PO4) and periphyton content all increased along the gradient from the natural stream to the urban-dominated catchment. The density
of interstitial assemblages corresponded with the conductivity (at P < 0.05) and was higher on the stream in urban-dominated catchments; and the Harpacticoida taxa richness, dominated by the
family Canthocamptidae, was also greater here. The Multiple Regression Analysis shows that the rate of deforestation had had
the most significant effect on the density of hyporheos. Among of crustacean fauna the representatives of epigean harpacticoids
from (of) family Canthocamptidae, dominated. |
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