地球温暖化と陸水環境　　地球温暖化と局所的環境撹乱が淡水魚類群集に及ぼす複合的影響　　メカニズム，予測そして波及効果

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  • Climatic warming and freshwater environment. Complex effects of global warming and local environmental disturbance on freshwater fish communities. The mechanisms, predictions, and repercussion effects.
  • チキュウ オンダンカ ト キョクショテキ カンキョウ カクラン ガ タンスイギョルイ グンシュウ ニ オヨボス フクゴウテキ エイキョウ メカニズム ヨソク ソシテ ハキュウ コウカ

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Research on potential effects of global warming on freshwater fishes has proliferated in 1990s. Most of these studies have focused on predicting changes in distribution of fishes based on their thermal-physiological data and on predicting population dynamics using species-specific bioenergetic models. However, in reality, the effects of global warming on freshwater fishes should not be predicted without considering the complex interactions with local environmental disturbance factors. In addition, in many cases, previous studies have failed to look at changes in genetic struc-ture of populations, life history plasticity, and biological interactions such as predator-prey and interspecific competition in their predictions. These resulted in our not having been able to precisely make reliable predictions of effects of global warming on freshwater fishes. Also, although extinc-tion and changes in distribution of the fishes should influence food web and biogeochemical cycling, few such studies have been attempted yet. Future researches should include attempts to accumulate field observational data and to elucidate potential mechanisms of the effects of global warming on the freshwater fishes in the context of multidisciplinary cooperative studies.

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