Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future
Abstract Variations in physical characteristics along the course of a river influence habitat availability which reflects in species distribution. Knowledge of ecology and diversity of lotic species is important for evaluating how river ecosystems will respond to environmental impacts. Freshwater de...
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| Format: | Article |
| Language: | English |
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Instituto Internacional de Ecologia
2017-03-01
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| Series: | Brazilian Journal of Biology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842017000400820&lng=en&tlng=en |
| _version_ | 1819085577825288192 |
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| author | E. F. Silva-Junior M. Silva-Araújo T. P. Moulton |
| author_facet | E. F. Silva-Junior M. Silva-Araújo T. P. Moulton |
| author_sort | E. F. Silva-Junior |
| collection | DOAJ |
| description | Abstract Variations in physical characteristics along the course of a river influence habitat availability which reflects in species distribution. Knowledge of ecology and diversity of lotic species is important for evaluating how river ecosystems will respond to environmental impacts. Freshwater decapods are a group of high ecological and economic importance, but the knowledge about factors influencing their distribution is scarce in Brazil. We performed a survey of decapods to describe their abundance and distribution as well as to study their relationships with stream physical variables and especially their association with different substrates types. We studied 23 sites located in 15 tributaries of Guapiaçú River, RJ, where we collected decapods in different substrates types and measured a set of physical variables. We found five decapods species, including amphidromous and non-amphidromous shrimps and crabs. Decapods were strongly associated with leaf-litter substrates and their abundance was related to a multivariate axis describing longitudinal changes in stream characteristics. We concluded that decapods occurring in the Guapiaçú catchment inhabit mainly small streams with preserved riparian forests where they find shelter and potential prey of invertebrates. The ongoing project to build a dam on the Guapiaçú River will have negative consequences to migrating shrimps and we strongly recommend that mitigating actions, such the construction of structures to allow the passage of migrating fauna, should be taken. |
| first_indexed | 2024-12-21T21:06:34Z |
| format | Article |
| id | doaj.art-bc7e4a6991974d5096b4763185f3b4c4 |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-12-21T21:06:34Z |
| publishDate | 2017-03-01 |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-bc7e4a6991974d5096b4763185f3b4c42022-12-21T18:50:16ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-43752017-03-0177482082910.1590/1519-6984.01916S1519-69842017000400820Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed futureE. F. Silva-JuniorM. Silva-AraújoT. P. MoultonAbstract Variations in physical characteristics along the course of a river influence habitat availability which reflects in species distribution. Knowledge of ecology and diversity of lotic species is important for evaluating how river ecosystems will respond to environmental impacts. Freshwater decapods are a group of high ecological and economic importance, but the knowledge about factors influencing their distribution is scarce in Brazil. We performed a survey of decapods to describe their abundance and distribution as well as to study their relationships with stream physical variables and especially their association with different substrates types. We studied 23 sites located in 15 tributaries of Guapiaçú River, RJ, where we collected decapods in different substrates types and measured a set of physical variables. We found five decapods species, including amphidromous and non-amphidromous shrimps and crabs. Decapods were strongly associated with leaf-litter substrates and their abundance was related to a multivariate axis describing longitudinal changes in stream characteristics. We concluded that decapods occurring in the Guapiaçú catchment inhabit mainly small streams with preserved riparian forests where they find shelter and potential prey of invertebrates. The ongoing project to build a dam on the Guapiaçú River will have negative consequences to migrating shrimps and we strongly recommend that mitigating actions, such the construction of structures to allow the passage of migrating fauna, should be taken.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842017000400820&lng=en&tlng=encamarõesfatores ambientaisfolhiçorios tropicaisrepresamento |
| spellingShingle | E. F. Silva-Junior M. Silva-Araújo T. P. Moulton Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future Brazilian Journal of Biology camarões fatores ambientais folhiço rios tropicais represamento |
| title | Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future |
| title_full | Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future |
| title_fullStr | Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future |
| title_full_unstemmed | Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future |
| title_short | Distribution and abundance of freshwater decapods in an Atlantic rainforest catchment with a dammed future |
| title_sort | distribution and abundance of freshwater decapods in an atlantic rainforest catchment with a dammed future |
| topic | camarões fatores ambientais folhiço rios tropicais represamento |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842017000400820&lng=en&tlng=en |
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