caa a22 4500 445890975 CHVBK 20180317145616.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10750-011-0633-4 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0633-4 Algal assemblages and their relationship with water quality in tropical Mexican streams with different land uses [Elektronische Daten] [G. Vázquez, J. Aké-Castillo, M. Favila] This study analyzes the relationship between physical and chemical factors and the algal communities in tropical streams in micro-watersheds where >70% of their area has different land uses, specifically, cloud mountain forest, coffee plantations, and livestock pastures. Physical, chemical, and biological variables were measured monthly in each stream over a 1-year period. The concentrations of nitrates+nitrites, total suspended solids (TSS), and silica in the streams were found to differ during the dry and rainy seasons. Coffee-plantation streams showed the highest levels of suspended solids, nitrates+nitrites, and sulfates. Based on chlorophyll a concentration, the forest and coffee-plantation streams are oligo-mesotrophic, while pasture streams are meso-eutrophic. Forest streams displayed the lowest levels of richness and algal diversity, followed by coffee-plantation streams, whereas pasture streams were the most diverse. Chlorophyll a concentration and species richness depended on land use and season. Forest coverage was positively correlated with acidophilous and oligo-eutraphentic diatom species. Coffee coverage displayed a significant positive correlation with motile species and a significant negative correlation with pollution-sensitive diatom taxa. The results show that diatom assemblages responded to micro-watershed conditions and can be used to monitor the effects of land use on streams in tropical regions. Springer Science+Business Media B.V., 2011 Tropical streams nationallicence Land use nationallicence Diatoms nationallicence Cloud forest nationallicence CCA nationallicence Mexico nationallicence Vázquez G. Instituto de Ecología, A.C., Carretera antigua a Coatepec No. 351 El Haya, 91070, Xalapa, Veracruz, Mexico aut Aké-Castillo J. Instituto de Ciencias Marinas y Pesquerías, Universidad Veracruzana, Calle Hidalgo No. 617, Col. Río Jamapa, 94290, Boca del Río, Veracruz, Mexico aut Favila M. Instituto de Ecología, A.C., Carretera antigua a Coatepec No. 351 El Haya, 91070, Xalapa, Veracruz, Mexico aut Hydrobiologia Springer Netherlands 667/1(2011-06-01), 173-189 0018-8158 667:1<173 2011 667 10750 https://doi.org/10.1007/s10750-011-0633-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0633-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Vázquez G. Instituto de Ecología, A.C., Carretera antigua a Coatepec No. 351 El Haya, 91070, Xalapa, Veracruz, Mexico aut NATIONALLICENCE 700 1- Aké-Castillo J. Instituto de Ciencias Marinas y Pesquerías, Universidad Veracruzana, Calle Hidalgo No. 617, Col. Río Jamapa, 94290, Boca del Río, Veracruz, Mexico aut NATIONALLICENCE 700 1- Favila M. Instituto de Ecología, A.C., Carretera antigua a Coatepec No. 351 El Haya, 91070, Xalapa, Veracruz, Mexico aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 667/1(2011-06-01), 173-189 0018-8158 667:1<173 2011 667 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer