Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth
Abstract Meltwater contributions to watersheds are shrinking as glaciers disappear, altering the flow, temperature, and biogeochemistry of freshwaters. A potential consequence of this landscape change is that streamflow patterns within glacierized watersheds will become more homogenous, potentially...
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crwiley:10.1002/lno.12251 2024-09-15T18:07:34+00:00 Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth Fellman, Jason B. Bellmore, J. Ryan Johnson, Connor Dunkle, Matthew R. Hood, Eran 2022 http://dx.doi.org/10.1002/lno.12251 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12251 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12251 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12251 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 68, issue 1, page 70-83 ISSN 0024-3590 1939-5590 journal-article 2022 crwiley https://doi.org/10.1002/lno.12251 2024-08-27T04:31:54Z Abstract Meltwater contributions to watersheds are shrinking as glaciers disappear, altering the flow, temperature, and biogeochemistry of freshwaters. A potential consequence of this landscape change is that streamflow patterns within glacierized watersheds will become more homogenous, potentially altering the capacity of watersheds to support Pacific salmon. To assess heterogeneity in stream habitat quality for juvenile salmon in a watershed in the Alaska Coast Mountains, we collected organic matter and invertebrate drift and measured streamwater physical and biogeochemical properties over the main runoff season in two adjacent tributaries, one fed mainly by rain and the other partially by glacier ice/snowmelt. We then used bioenergetic modeling to evaluate how temporal patterns in water temperature and invertebrate drift in each tributary influence juvenile salmon growth potential. Across the study period, average invertebrate drift concentrations were similar in non‐glacierized Montana (0.33 mg m −3 ) and glacier‐influenced McGinnis Creeks (0.38 mg m −3 ). However, seasonal patterns of invertebrate drift were temporally asynchronous between the two streams. Invertebrate drift and modeled fish growth were generally higher in McGinnis Creek in the spring and Montana Creek in the Summer. For juvenile salmon, tracking these resource asynchronies by moving between tributaries resulted in 20% greater growth than could be obtained within either stream alone. These results suggest that hydrologic heterogeneity within watersheds may enhance the diversity of foraging and growth opportunities for mobile aquatic organisms, which may be essential for supporting productive and resilient natural salmon runs. Article in Journal/Newspaper glacier glaciers Alaska Wiley Online Library Limnology and Oceanography 68 1 70 83 |
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Wiley Online Library |
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language |
English |
description |
Abstract Meltwater contributions to watersheds are shrinking as glaciers disappear, altering the flow, temperature, and biogeochemistry of freshwaters. A potential consequence of this landscape change is that streamflow patterns within glacierized watersheds will become more homogenous, potentially altering the capacity of watersheds to support Pacific salmon. To assess heterogeneity in stream habitat quality for juvenile salmon in a watershed in the Alaska Coast Mountains, we collected organic matter and invertebrate drift and measured streamwater physical and biogeochemical properties over the main runoff season in two adjacent tributaries, one fed mainly by rain and the other partially by glacier ice/snowmelt. We then used bioenergetic modeling to evaluate how temporal patterns in water temperature and invertebrate drift in each tributary influence juvenile salmon growth potential. Across the study period, average invertebrate drift concentrations were similar in non‐glacierized Montana (0.33 mg m −3 ) and glacier‐influenced McGinnis Creeks (0.38 mg m −3 ). However, seasonal patterns of invertebrate drift were temporally asynchronous between the two streams. Invertebrate drift and modeled fish growth were generally higher in McGinnis Creek in the spring and Montana Creek in the Summer. For juvenile salmon, tracking these resource asynchronies by moving between tributaries resulted in 20% greater growth than could be obtained within either stream alone. These results suggest that hydrologic heterogeneity within watersheds may enhance the diversity of foraging and growth opportunities for mobile aquatic organisms, which may be essential for supporting productive and resilient natural salmon runs. |
format |
Article in Journal/Newspaper |
author |
Fellman, Jason B. Bellmore, J. Ryan Johnson, Connor Dunkle, Matthew R. Hood, Eran |
spellingShingle |
Fellman, Jason B. Bellmore, J. Ryan Johnson, Connor Dunkle, Matthew R. Hood, Eran Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth |
author_facet |
Fellman, Jason B. Bellmore, J. Ryan Johnson, Connor Dunkle, Matthew R. Hood, Eran |
author_sort |
Fellman, Jason B. |
title |
Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth |
title_short |
Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth |
title_full |
Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth |
title_fullStr |
Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth |
title_full_unstemmed |
Glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: Implications for juvenile salmon growth |
title_sort |
glacier runoff influences biogeochemistry and resource availability in coastal temperate rainforest streams: implications for juvenile salmon growth |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/lno.12251 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12251 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12251 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12251 |
genre |
glacier glaciers Alaska |
genre_facet |
glacier glaciers Alaska |
op_source |
Limnology and Oceanography volume 68, issue 1, page 70-83 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.12251 |
container_title |
Limnology and Oceanography |
container_volume |
68 |
container_issue |
1 |
container_start_page |
70 |
op_container_end_page |
83 |
_version_ |
1810444949801402368 |