Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban Streams

Thermal regime warming and increased variability can result in human developed watersheds due to runoff over impervious surfaces and influence of stormwater pipes. This study quantified relationships between tree canopy, impervious surface, and water temperature in stream sites with 4 to 62% impervi...

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Main Authors: Anne Timm, Valerie Ouellet, Melinda Daniels
Format: Article
Language:English
Published: MDPI AG 2021-10-01
Series:Water
Subjects:
Online Access:https://www.mdpi.com/2073-4441/13/19/2732
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author Anne Timm
Valerie Ouellet
Melinda Daniels
author_facet Anne Timm
Valerie Ouellet
Melinda Daniels
author_sort Anne Timm
collection DOAJ
description Thermal regime warming and increased variability can result in human developed watersheds due to runoff over impervious surfaces and influence of stormwater pipes. This study quantified relationships between tree canopy, impervious surface, and water temperature in stream sites with 4 to 62% impervious land cover in their “loggersheds” to predict water temperature metrics relevant to aquatic species thermal stress thresholds. This study identified significant (≥0.7, <i>p</i> < 0.05) negative correlations between water temperature and percent tree canopy in the 5 m riparian area and positive correlations between water temperature and total length of stormwater pipe in the loggershed. Mixed-effects models predicted that tree canopy cover in the 5 m riparian area would reduce water temperatures 0.01 to 6 °C and total length of stormwater pipes in the loggershed would increase water temperatures 0.01 to 2.6 °C. To our knowledge, this is the first time that the relationship between stormwater pipes and water temperature metrics has been explored to better understand thermal dynamics in urban watersheds. The results highlight important aspects of thermal habitat quality and water temperature variability for aquatic species living in urban streams based on thermal thresholds relevant to species metabolism, growth, and life history.
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spelling doaj.art-96c597774763418fae8cf774f8a2c7072023-11-22T17:01:49ZengMDPI AGWater2073-44412021-10-011319273210.3390/w13192732Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban StreamsAnne Timm0Valerie Ouellet1Melinda Daniels2USDA Forest Service, Northern Research Station, Baltimore, MD 21228, USAStroud Water Research Center, Avondale, PA 19311, USAStroud Water Research Center, Avondale, PA 19311, USAThermal regime warming and increased variability can result in human developed watersheds due to runoff over impervious surfaces and influence of stormwater pipes. This study quantified relationships between tree canopy, impervious surface, and water temperature in stream sites with 4 to 62% impervious land cover in their “loggersheds” to predict water temperature metrics relevant to aquatic species thermal stress thresholds. This study identified significant (≥0.7, <i>p</i> < 0.05) negative correlations between water temperature and percent tree canopy in the 5 m riparian area and positive correlations between water temperature and total length of stormwater pipe in the loggershed. Mixed-effects models predicted that tree canopy cover in the 5 m riparian area would reduce water temperatures 0.01 to 6 °C and total length of stormwater pipes in the loggershed would increase water temperatures 0.01 to 2.6 °C. To our knowledge, this is the first time that the relationship between stormwater pipes and water temperature metrics has been explored to better understand thermal dynamics in urban watersheds. The results highlight important aspects of thermal habitat quality and water temperature variability for aquatic species living in urban streams based on thermal thresholds relevant to species metabolism, growth, and life history.https://www.mdpi.com/2073-4441/13/19/2732tree canopy coverwater temperatureimpervious surfaceurban ecologyphenology
spellingShingle Anne Timm
Valerie Ouellet
Melinda Daniels
Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban Streams
Water
tree canopy cover
water temperature
impervious surface
urban ecology
phenology
title Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban Streams
title_full Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban Streams
title_fullStr Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban Streams
title_full_unstemmed Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban Streams
title_short Riparian Land Cover, Water Temperature Variability, and Thermal Stress for Aquatic Species in Urban Streams
title_sort riparian land cover water temperature variability and thermal stress for aquatic species in urban streams
topic tree canopy cover
water temperature
impervious surface
urban ecology
phenology
url https://www.mdpi.com/2073-4441/13/19/2732
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AT valerieouellet riparianlandcoverwatertemperaturevariabilityandthermalstressforaquaticspeciesinurbanstreams
AT melindadaniels riparianlandcoverwatertemperaturevariabilityandthermalstressforaquaticspeciesinurbanstreams