Fish assemblage composition, abundance-habitat relationships and habitat use in tropical rain forest streams, Sarawak, Borneo: effects of past deforestation

DOI 被引用文献1件 参考文献45件

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説明

Habitat use, abundance-habitat relationships and assemblage composition of tropical freshwater fishes were surveyed in streams running through primary and secondary (deforested 9-20 years prior to the survey by slash-and-burn agriculture) forests in the Rayu River watershed, Sarawak, Borneo. Five species (Puntius kuchingensis, P. binotatus, Rasbora sarawakensis, R. caudimaculata, and Hemirhamphodon kuekenthali), of which habitat use was investigated, exhibited distinct diel habitat shifts between midstream and channel margin. Their abundances were related to habitat variables with the exception of P. binotatus. Puntius kuchingensis decreased with the increase of eroded banks. The abundance of R. caudimaculata increased downstream, while R. sarawakensis was less abundant in streams without riffle habitats. Hemirhamphodon kuekenthali was absent from high-gradient streams. Both habitat characteristics and fish assemblage composition differed distinctly between the primary-and secondary-forest streams. The secondary-forest streams were characterized by sandy substrates and eroded banks, suggesting a long persistence of sedimentation caused by the past deforestation. Macrognathus maculatus, Betta akarensis and P. kuchingensis appeared to be susceptible to sedimentation effects. Our data provide circumstantial evidence of the impact of past deforestation on fish assemblages in the Rayu River watershed.

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詳細情報 詳細情報について

  • CRID
    1390282681070595200
  • NII論文ID
    110001817349
  • NII書誌ID
    AA11499342
  • DOI
    10.20798/biospherecons.5.2_71
  • ISSN
    24331260
    13446797
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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