Context-dependent effects of geographic, climate and land cover factors on hemipteran assemblages in different ecoregions of China
Mao, Jiaping; Jiang, Xiaoming; Tang, Wenjia; Heino, Jani; Alahuhta, Janne; Huang, Xiaolei (2024-08-09)
Wiley-Blackwell
09.08.2024
Mao, J., Jiang, X., Tang, W., Heino, J., Alahuhta, J. & Huang, X. (2024) Context-dependent effects of geographic, climate and land cover factors on hemipteran assemblages in different ecoregions of China. Insect Conservation and Diversity, 17(6), 1127–1142. Available from: https://doi.org/10.1111/icad.12774.
https://creativecommons.org/licenses/by-nc/4.0/
© 2024 The Author(s). Insect Conservation and Diversity published by John Wiley & Sons Ltd on behalf of Royal Entomological Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
© 2024 The Author(s). Insect Conservation and Diversity published by John Wiley & Sons Ltd on behalf of Royal Entomological Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
https://creativecommons.org/licenses/by-nc/4.0/
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202408165446
https://urn.fi/URN:NBN:fi:oulu-202408165446
Tiivistelmä
Abstract
1. Understanding variation in assemblage composition (i.e., beta diversity) along geographic and environmental gradients is a central topic in biogeography and ecology.
2. We compared relationships between hemipteran beta diversity (overall dissimilarity: βtotal, Sorensen dissimilarity; turnover component: βsim, the replacement of species between assemblages; nestedness-resultant component: βsne, the nested difference in richness between assemblages) and geographic, climatic and land cover distances among four ecoregions (Northeast Ecoregion; Northern Ecoregion; Tibet Ecoregion; Southern Ecoregion) across China.
3. The hemipteran assemblage composition differed markedly among ecoregions. In general, βtotal and βsim both significantly increased with increasing geographic, climatic and land cover distances.
4. Intercepts and slopes of dissimilarity-distance relationships all varied significantly among different ecoregions, suggesting different levels of within-ecoregion assemblage heterogeneity and change rate in assemblage composition. Moreover, the slopes of βtotal and βsim were highest in Northeast Ecoregion but lowest in Northern Ecoregion, exhibiting latitudinal and longitudinal dissimilarity pattern.
5. According to variation partitioning analysis, although the overall explained variance was relatively low, spatial variables explained a much greater proportion of variance compared to climate and land cover variables.
6. To conclude, our results showed significant regional differences in assemblage composition and biodiversity among ecoregions. Both dispersal-related and niche-related processes affect hemipteran assemblage structure, while the low overall explained variance indicates that high dissimilarity in hemipteran composition is affected by multiple factors and processes that remained undetected in this study.
7. Our results may be relevant for wider insect groups because hemipterans constitute a highly diverse group in terms of phylogenetic origins and functional significance.
1. Understanding variation in assemblage composition (i.e., beta diversity) along geographic and environmental gradients is a central topic in biogeography and ecology.
2. We compared relationships between hemipteran beta diversity (overall dissimilarity: βtotal, Sorensen dissimilarity; turnover component: βsim, the replacement of species between assemblages; nestedness-resultant component: βsne, the nested difference in richness between assemblages) and geographic, climatic and land cover distances among four ecoregions (Northeast Ecoregion; Northern Ecoregion; Tibet Ecoregion; Southern Ecoregion) across China.
3. The hemipteran assemblage composition differed markedly among ecoregions. In general, βtotal and βsim both significantly increased with increasing geographic, climatic and land cover distances.
4. Intercepts and slopes of dissimilarity-distance relationships all varied significantly among different ecoregions, suggesting different levels of within-ecoregion assemblage heterogeneity and change rate in assemblage composition. Moreover, the slopes of βtotal and βsim were highest in Northeast Ecoregion but lowest in Northern Ecoregion, exhibiting latitudinal and longitudinal dissimilarity pattern.
5. According to variation partitioning analysis, although the overall explained variance was relatively low, spatial variables explained a much greater proportion of variance compared to climate and land cover variables.
6. To conclude, our results showed significant regional differences in assemblage composition and biodiversity among ecoregions. Both dispersal-related and niche-related processes affect hemipteran assemblage structure, while the low overall explained variance indicates that high dissimilarity in hemipteran composition is affected by multiple factors and processes that remained undetected in this study.
7. Our results may be relevant for wider insect groups because hemipterans constitute a highly diverse group in terms of phylogenetic origins and functional significance.
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