Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities
Abstract To understand energy and material cycles on surface Earth, it is important yet challenging to estimate trophic transfer through ecosystems. To address this issue, the integrated trophic position (iTP), defined as a biomass-weighted average TP of a given food web, is useful because the iTP c...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-01-01
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| Series: | Progress in Earth and Planetary Science |
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| Online Access: | https://doi.org/10.1186/s40645-024-00671-6 |
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| author | Naoto F. Ishikawa Yoshitoshi Uehara Takuya Ishida Tohru Ikeya Satoshi Asano Chia-Ying Ko Tomoya Iwata Ichiro Tayasu Naohiko Ohkouchi Noboru Okuda |
| author_facet | Naoto F. Ishikawa Yoshitoshi Uehara Takuya Ishida Tohru Ikeya Satoshi Asano Chia-Ying Ko Tomoya Iwata Ichiro Tayasu Naohiko Ohkouchi Noboru Okuda |
| author_sort | Naoto F. Ishikawa |
| collection | DOAJ |
| description | Abstract To understand energy and material cycles on surface Earth, it is important yet challenging to estimate trophic transfer through ecosystems. To address this issue, the integrated trophic position (iTP), defined as a biomass-weighted average TP of a given food web, is useful because the iTP can be a proxy for the configuration of ecological pyramid. Here we conducted the compound-specific nitrogen isotope analysis of amino acids for macroinvertebrate communities collected from the Ado and Yasu Rivers in the Lake Biwa watershed, Japan, to estimate their iTP values. Unlike previous studies, no clear relationships between iTP and biodiversity (Shannon index H’) were found. However, by comparing the irrigated period and the non-irrigated period within the Yasu River, the decrease in iTP values was fairly characterized by the increase in H’. A significant difference in the observed iTP values compared to those reported in the previous study suggests that the configuration of ecological pyramid in stream ecosystems is dynamic rather than static. We also found that the iTP values of stream macroinvertebrate communities (2.37 ± 0.24) (n = 43), marine mesozooplankton communities (2.33 ± 0.34) (n = 14), and animal communities with various taxonomic groups (2.42 ± 0.21) (n = 158) are all comparable with each other, suggesting that partial communities involving macroinvertebrates well represent the configuration of total ecological pyramid. This finding clearly delineates the promising performance of the iTP index for the trophic transfer of energy, which should be further explored in a variety of ecosystems. |
| format | Article |
| id | doaj-art-253bb1adaf9f408693eaab79ca76d343 |
| institution | DOAJ |
| issn | 2197-4284 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Progress in Earth and Planetary Science |
| spelling | doaj-art-253bb1adaf9f408693eaab79ca76d3432025-08-20T02:46:13ZengSpringerOpenProgress in Earth and Planetary Science2197-42842025-01-0112111010.1186/s40645-024-00671-6Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communitiesNaoto F. Ishikawa0Yoshitoshi Uehara1Takuya Ishida2Tohru Ikeya3Satoshi Asano4Chia-Ying Ko5Tomoya Iwata6Ichiro Tayasu7Naohiko Ohkouchi8Noboru Okuda9Japan Agency for Marine-Earth Science and TechnologyResearch Institute for Humanity and NatureGraduate School of Advanced Science and Engineering, Hiroshima UniversityRitsumeikan UniversityKyoto UniversityInstitute of Fisheries Science, National Taiwan UniversityUniversity of YamanashiResearch Institute for Humanity and NatureJapan Agency for Marine-Earth Science and TechnologyKobe UniversityAbstract To understand energy and material cycles on surface Earth, it is important yet challenging to estimate trophic transfer through ecosystems. To address this issue, the integrated trophic position (iTP), defined as a biomass-weighted average TP of a given food web, is useful because the iTP can be a proxy for the configuration of ecological pyramid. Here we conducted the compound-specific nitrogen isotope analysis of amino acids for macroinvertebrate communities collected from the Ado and Yasu Rivers in the Lake Biwa watershed, Japan, to estimate their iTP values. Unlike previous studies, no clear relationships between iTP and biodiversity (Shannon index H’) were found. However, by comparing the irrigated period and the non-irrigated period within the Yasu River, the decrease in iTP values was fairly characterized by the increase in H’. A significant difference in the observed iTP values compared to those reported in the previous study suggests that the configuration of ecological pyramid in stream ecosystems is dynamic rather than static. We also found that the iTP values of stream macroinvertebrate communities (2.37 ± 0.24) (n = 43), marine mesozooplankton communities (2.33 ± 0.34) (n = 14), and animal communities with various taxonomic groups (2.42 ± 0.21) (n = 158) are all comparable with each other, suggesting that partial communities involving macroinvertebrates well represent the configuration of total ecological pyramid. This finding clearly delineates the promising performance of the iTP index for the trophic transfer of energy, which should be further explored in a variety of ecosystems.https://doi.org/10.1186/s40645-024-00671-6BiomassCSIA-AAEcological pyramidTrophic transferOperationally defined community |
| spellingShingle | Naoto F. Ishikawa Yoshitoshi Uehara Takuya Ishida Tohru Ikeya Satoshi Asano Chia-Ying Ko Tomoya Iwata Ichiro Tayasu Naohiko Ohkouchi Noboru Okuda Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities Progress in Earth and Planetary Science Biomass CSIA-AA Ecological pyramid Trophic transfer Operationally defined community |
| title | Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities |
| title_full | Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities |
| title_fullStr | Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities |
| title_full_unstemmed | Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities |
| title_short | Spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities |
| title_sort | spatiotemporal variations in integrated trophic positions of stream macroinvertebrate communities |
| topic | Biomass CSIA-AA Ecological pyramid Trophic transfer Operationally defined community |
| url | https://doi.org/10.1186/s40645-024-00671-6 |
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