Stability and resilience of seagrass meadows to seasonal and interannual dynamics and environmental stress

Shallow coastal bays provide habitat for diverse fish and invertebrate populations and are an important source of sediment for surrounding marshes. The sediment dynamics of these bays are strongly affected by seagrass meadows, which limit sediment resuspension, thereby providing a more favorable lig...

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Veröffentlicht in:Journal of Geophysical Research: Biogeosciences 2012-03, Vol.117 (G1), p.n/a
Hauptverfasser: Carr, Joel A., D'Odorico, Paolo, McGlathery, Karen J., Wiberg, Patricia L.
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container_issue G1
container_start_page
container_title Journal of Geophysical Research: Biogeosciences
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creator Carr, Joel A.
D'Odorico, Paolo
McGlathery, Karen J.
Wiberg, Patricia L.
description Shallow coastal bays provide habitat for diverse fish and invertebrate populations and are an important source of sediment for surrounding marshes. The sediment dynamics of these bays are strongly affected by seagrass meadows, which limit sediment resuspension, thereby providing a more favorable light environment for their own survival and growth. Due to this positive feedback between seagrass and light conditions, it has been suggested that bare sediment and seagrass meadows are potential alternate stable states of the benthos in shallow coastal bays. To investigate the stability and resilience of seagrass meadows subjected to variation in environmental conditions (e.g., light, temperature), a coupled model of vegetation–sediment–water flow interactions and vegetation growth was developed. The model was used to examine the effect of dynamically varying seasonal and interannual seagrass density on sediment resuspension, water column turbidity, and the subsequent light environment on hourly time steps and then run over decadal time scales. A daily growth model was designed to capture both belowground biomass and the growth and senescence of aboveground biomass structural components (e.g., leaves and stems). This allowed us to investigate how the annual and seasonal variability in shoot and leaf density within a meadow affects the strength of positive feedbacks between seagrass and their light environment. The model demonstrates both the emergence of bistable behavior from 1.6 to 1.8 m mean sea level due to the strength of the positive feedback, as well as the limited resilience of seagrass meadows within this bistable range. Key Points The model shows the emergence of bistable dynamics with depth and meadow state Meadows within the bistable range exhibit limited resilience Irrecoverable collapse of these meadows can take many years
doi_str_mv 10.1029/2011JG001744
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The sediment dynamics of these bays are strongly affected by seagrass meadows, which limit sediment resuspension, thereby providing a more favorable light environment for their own survival and growth. Due to this positive feedback between seagrass and light conditions, it has been suggested that bare sediment and seagrass meadows are potential alternate stable states of the benthos in shallow coastal bays. To investigate the stability and resilience of seagrass meadows subjected to variation in environmental conditions (e.g., light, temperature), a coupled model of vegetation–sediment–water flow interactions and vegetation growth was developed. The model was used to examine the effect of dynamically varying seasonal and interannual seagrass density on sediment resuspension, water column turbidity, and the subsequent light environment on hourly time steps and then run over decadal time scales. A daily growth model was designed to capture both belowground biomass and the growth and senescence of aboveground biomass structural components (e.g., leaves and stems). This allowed us to investigate how the annual and seasonal variability in shoot and leaf density within a meadow affects the strength of positive feedbacks between seagrass and their light environment. The model demonstrates both the emergence of bistable behavior from 1.6 to 1.8 m mean sea level due to the strength of the positive feedback, as well as the limited resilience of seagrass meadows within this bistable range. Key Points The model shows the emergence of bistable dynamics with depth and meadow state Meadows within the bistable range exhibit limited resilience Irrecoverable collapse of these meadows can take many years</description><identifier>ISSN: 0148-0227</identifier><identifier>ISSN: 2169-8953</identifier><identifier>EISSN: 2156-2202</identifier><identifier>EISSN: 2169-8961</identifier><identifier>DOI: 10.1029/2011JG001744</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Bays ; Benthos ; bistable dynamics ; Earth sciences ; Earth, ocean, space ; Ecosystem biology ; Environmental conditions ; Environmental stress ; Exact sciences and technology ; Fish populations ; Geobiology ; Grasses ; Leaves ; Light ; modeling ; positive feedbacks ; resilience ; seagrass ; Seasonal variations ; Sediments ; Turbidity ; Vegetation ; Water column ; Water flow ; Zostera marina</subject><ispartof>Journal of Geophysical Research: Biogeosciences, 2012-03, Vol.117 (G1), p.n/a</ispartof><rights>Copyright 2012 by the American Geophysical Union</rights><rights>2015 INIST-CNRS</rights><rights>Copyright 2012 by American Geophysical Union</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5808-4dd0e31af2b316ba5d90a7fd4658707bb297fda1d7c9a3f5dbfe485735d7b0483</citedby><cites>FETCH-LOGICAL-c5808-4dd0e31af2b316ba5d90a7fd4658707bb297fda1d7c9a3f5dbfe485735d7b0483</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2011JG001744$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2011JG001744$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>315,781,785,1418,1434,11519,27929,27930,45579,45580,46414,46473,46838,46897</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=25973951$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Carr, Joel A.</creatorcontrib><creatorcontrib>D'Odorico, Paolo</creatorcontrib><creatorcontrib>McGlathery, Karen J.</creatorcontrib><creatorcontrib>Wiberg, Patricia L.</creatorcontrib><title>Stability and resilience of seagrass meadows to seasonal and interannual dynamics and environmental stress</title><title>Journal of Geophysical Research: Biogeosciences</title><addtitle>J. Geophys. Res</addtitle><description>Shallow coastal bays provide habitat for diverse fish and invertebrate populations and are an important source of sediment for surrounding marshes. The sediment dynamics of these bays are strongly affected by seagrass meadows, which limit sediment resuspension, thereby providing a more favorable light environment for their own survival and growth. Due to this positive feedback between seagrass and light conditions, it has been suggested that bare sediment and seagrass meadows are potential alternate stable states of the benthos in shallow coastal bays. To investigate the stability and resilience of seagrass meadows subjected to variation in environmental conditions (e.g., light, temperature), a coupled model of vegetation–sediment–water flow interactions and vegetation growth was developed. 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Geophys. Res</addtitle><date>2012-03</date><risdate>2012</risdate><volume>117</volume><issue>G1</issue><epage>n/a</epage><issn>0148-0227</issn><issn>2169-8953</issn><eissn>2156-2202</eissn><eissn>2169-8961</eissn><abstract>Shallow coastal bays provide habitat for diverse fish and invertebrate populations and are an important source of sediment for surrounding marshes. The sediment dynamics of these bays are strongly affected by seagrass meadows, which limit sediment resuspension, thereby providing a more favorable light environment for their own survival and growth. Due to this positive feedback between seagrass and light conditions, it has been suggested that bare sediment and seagrass meadows are potential alternate stable states of the benthos in shallow coastal bays. 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The model demonstrates both the emergence of bistable behavior from 1.6 to 1.8 m mean sea level due to the strength of the positive feedback, as well as the limited resilience of seagrass meadows within this bistable range. Key Points The model shows the emergence of bistable dynamics with depth and meadow state Meadows within the bistable range exhibit limited resilience Irrecoverable collapse of these meadows can take many years</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2011JG001744</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record>
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subjects Bays
Benthos
bistable dynamics
Earth sciences
Earth, ocean, space
Ecosystem biology
Environmental conditions
Environmental stress
Exact sciences and technology
Fish populations
Geobiology
Grasses
Leaves
Light
modeling
positive feedbacks
resilience
seagrass
Seasonal variations
Sediments
Turbidity
Vegetation
Water column
Water flow
Zostera marina
title Stability and resilience of seagrass meadows to seasonal and interannual dynamics and environmental stress
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