Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream
Through a manipulative experiment, the colonization of leaf litter by invertebrates was investigated in two sections of a tropical stream (spatial scale) that differed in function of the canopy cover, one with the presence (closed area) and another without riparian vegetation (open area), during one...
Main Authors: | , |
---|---|
Format: | Article |
Language: | English |
Published: |
Instituto Internacional de Ecologia
|
Series: | Brazilian Journal of Biology |
Subjects: | |
Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842015000200022&lng=en&tlng=en |
id |
doaj-9d925f4b8fb346fb98ca6c2510b4bd8f |
---|---|
record_format |
Article |
spelling |
doaj-9d925f4b8fb346fb98ca6c2510b4bd8f2020-11-25T02:27:44ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-437575240541310.1590/1519-6984.15013S1519-69842015000200022Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical streamVS. UiedaEM. CarvalhoThrough a manipulative experiment, the colonization of leaf litter by invertebrates was investigated in two sections of a tropical stream (spatial scale) that differed in function of the canopy cover, one with the presence (closed area) and another without riparian vegetation (open area), during one month of the dry and one of the wet season (temporal scale). The work aimed to verify differences related to four variables: season, canopy cover, leaf type and leaf condition. Litter bags containing arboreal and herbaceous leaves (leaf type variable), non-conditioned and preconditioned (leaf condition variable) were placed at the bottom of the stream in each area (canopy cover variable) and season (dry and wet), and removed after 13-day colonization. The analysis of the remaining litter dry mass per leaf bag emphasizes differences related mainly to seasonality, canopy cover and leaf type, although leaf condition was also important when combined with those three factors. Comparing the abundance of invertebrates per treatment, there was a tendency of high predominance of Chironomidae during the dry season and greater taxa diversity and evenness during the wet season, when the water flow increase could alter the availability of microhabitats for local fauna. Even though canopy cover alone was not a significant source of variation in the abundance of invertebrates, the results showed a tendency of a combined effect of canopy cover with seasonality and leaf condition.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842015000200022&lng=en&tlng=enaquatic insectsleaf breakdownheadwater streamsseasonal variationspatial variation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
VS. Uieda EM. Carvalho |
spellingShingle |
VS. Uieda EM. Carvalho Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream Brazilian Journal of Biology aquatic insects leaf breakdown headwater streams seasonal variation spatial variation |
author_facet |
VS. Uieda EM. Carvalho |
author_sort |
VS. Uieda |
title |
Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream |
title_short |
Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream |
title_full |
Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream |
title_fullStr |
Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream |
title_full_unstemmed |
Experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream |
title_sort |
experimental manipulation of leaf litter colonization by aquatic invertebrates in a third order tropical stream |
publisher |
Instituto Internacional de Ecologia |
series |
Brazilian Journal of Biology |
issn |
1678-4375 |
description |
Through a manipulative experiment, the colonization of leaf litter by invertebrates was investigated in two sections of a tropical stream (spatial scale) that differed in function of the canopy cover, one with the presence (closed area) and another without riparian vegetation (open area), during one month of the dry and one of the wet season (temporal scale). The work aimed to verify differences related to four variables: season, canopy cover, leaf type and leaf condition. Litter bags containing arboreal and herbaceous leaves (leaf type variable), non-conditioned and preconditioned (leaf condition variable) were placed at the bottom of the stream in each area (canopy cover variable) and season (dry and wet), and removed after 13-day colonization. The analysis of the remaining litter dry mass per leaf bag emphasizes differences related mainly to seasonality, canopy cover and leaf type, although leaf condition was also important when combined with those three factors. Comparing the abundance of invertebrates per treatment, there was a tendency of high predominance of Chironomidae during the dry season and greater taxa diversity and evenness during the wet season, when the water flow increase could alter the availability of microhabitats for local fauna. Even though canopy cover alone was not a significant source of variation in the abundance of invertebrates, the results showed a tendency of a combined effect of canopy cover with seasonality and leaf condition. |
topic |
aquatic insects leaf breakdown headwater streams seasonal variation spatial variation |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842015000200022&lng=en&tlng=en |
work_keys_str_mv |
AT vsuieda experimentalmanipulationofleaflittercolonizationbyaquaticinvertebratesinathirdordertropicalstream AT emcarvalho experimentalmanipulationofleaflittercolonizationbyaquaticinvertebratesinathirdordertropicalstream |
_version_ |
1724841122119811072 |