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Your search keyword '"McGlathery, Karen J."' showing total 169 results
Start Over Author "McGlathery, Karen J." Publication Type Academic Journals
169 results on '"McGlathery, Karen J."'

2. Seagrass ecosystem recovery: Experimental removal and synthesis of disturbance studies.

Author

Tassone, Spencer J., Ewers Lewis, Carolyn J., McGlathery, Karen J., and Pace, Michael L.

Subjects
ZOSTERA marina, SEAGRASSES, THERMAL stresses, ZOSTERA, HEAT waves (Meteorology), STORMS, NET losses
Abstract

Net global losses of seagrasses have accelerated efforts to understand recovery from disturbances. Stressors causing disturbances (e.g., storms, heatwaves, boating) vary temporally and spatially within meadows potentially affecting recovery. To test differential recovery, we conducted a removal experiment at sites that differed in thermal stress for a temperate seagrass (Zostera marina). We also synthesized prior studies of seagrass recovery to assess general patterns. Seagrass shoots were removed from 28.3 m2 plots at edge and central sites of a meadow in South Bay, Virginia, USA. We hypothesized faster recovery for edge plots where greater oceanic exchange reduces thermal stress. Contrary to our hypothesis recovery was most rapid in the central meadow matching control site shoot density in 24 months. Recovery was incomplete at the meadow edge and estimated to require 158 months. Differences in recovery were likely due to storm‐driven sediment erosion at the edge sites. Based on data from prior recovery studies, which were primarily on monospecific meadows of Zostera, seagrasses recover across a broad range of conditions with a positive, nonlinear relationship between disturbance area and recovery time. Our experiment indicates position within a seagrass meadow affects disturbance susceptibility and length of recovery. Linking this finding to our literature synthesis suggests increased attention to spatial context will contribute to better understanding variation in recovery rates. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Spatially explicit feedbacks between seagrass meadow structure, sediment and light: Habitat suitability for seagrass growth

Author

Carr, Joel A, D'Odorico, Paolo, McGlathery, Karen J, and Wiberg, Patricia L

Subjects
Life Below Water, Seagrass, Resilience, Shear partitioning, Bistable dynamics, Modeling, Sediment resuspension, Applied Mathematics, Civil Engineering, Environmental Engineering
Abstract

In shallow coastal bays where nutrient loading and riverine inputs are low, turbidity, and the consequent light environment are controlled by resuspension of bed sediments due to wind-waves and tidal currents. High sediment resuspension and low light environments can limit benthic primary productivity; however, both currents and waves are affected by the presence of benthic plants such as seagrass. This feedback between the presence of benthic primary producers such as seagrass and the consequent light environment has been predicted to induce bistable dynamics locally. However, these vegetated areas influence a larger area than they footprint, including a barren adjacent downstream area which exhibits reduced shear stresses. Here we explore through modeling how the patchy structure of seagrass meadows on a landscape may affect sediment resuspension and the consequent light environment due to the presence of this sheltered region. Heterogeneous vegetation covers comprising a mosaic of randomly distributed patches were generated to investigate the effect of patch modified hydrodynamics. Actual cover of vegetation on the landscape was used to facilitate comparisons across landscape realizations. Hourly wave and current shear stresses on the landscape along with suspended sediment concentration and light attenuation characteristics were then calculated and spatially averaged to examine how actual cover and mean water depth affect the bulk sediment and light environment. The results indicate that an effective cover, which incorporates the sheltering area, has important controls on the distributions of shear stress, suspended sediment, light environment, and consequent seagrass habitat suitability. Interestingly, an optimal habitat occurs within a depth range where, if actual cover is reduced past some threshold, the bulk light environment would no longer favor seagrass growth.

Published
2016

20. Author Correction: The future of Blue Carbon science

Author

Macreadie, Peter I., Anton, Andrea, Raven, John A., Beaumont, Nicola, Connolly, Rod M., Friess, Daniel A., Kelleway, Jeffrey J., Kennedy, Hilary, Kuwae, Tomohiro, Lavery, Paul S., Lovelock, Catherine E., Smale, Dan A., Apostolaki, Eugenia T., Atwood, Trisha B., Baldock, Jeff, Bianchi, Thomas S., Chmura, Gail L., Eyre, Bradley D., Fourqurean, James W., Hall-Spencer, Jason M., Huxham, Mark, Hendriks, Iris E., Krause-Jensen, Dorte, Laffoley, Dan, Luisetti, Tiziana, Marbà, Núria, Masque, Pere, McGlathery, Karen J., Megonigal, J. Patrick, Murdiyarso, Daniel, Russell, Bayden D., Santos, Rui, Serrano, Oscar, Silliman, Brian R., Watanabe, Kenta, and Duarte, Carlos M.

Published
2019
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21. Effects of seagrass restoration on coastal fish abundance and diversity.

Author

Hardison, Sean B., McGlathery, Karen J., and Castorani, Max C. N.

Subjects
*SEAGRASS restoration, *FISH diversity, *SEAGRASSES, *RESTORATION ecology, *POSIDONIA, *ECOSYSTEM services, *STRUCTURAL equation modeling, *SPECIES diversity
Abstract

Restoration is accelerating to reverse global declines of key habitats and recover lost ecosystem functions, particularly in coastal ecosystems. However, there is high uncertainty about the long‐term capacity of restored ecosystems to provide habitat and increase biodiversity and the degree to which these ecosystem services are mediated by spatial and temporal environmental variability. We addressed these gaps by sampling fishes biannually for 5–7 years (2012–2018) at 16 sites inside and outside a rapidly expanding restored seagrass meadow in coastal Virginia (USA). Despite substantial among‐year variation in abundance and species composition, seine catches in restored seagrass beds were consistently larger (6.4 times more fish, p < 0.001) and more speciose (2.6 times greater species richness, p < 0.001; 3.1 times greater Hill–Shannon diversity, p = 0.03) than seine catches in adjacent unvegetated areas. Catches were particularly larger during summer than autumn (p < 0.01). Structural equation modeling revealed that depth and water residence time interacted to control seagrass presence, leading to higher fish abundance and richness in shallow, well‐flushed areas that supported seagrass. Together, our results indicate that seagrass restoration yields large and consistent benefits for many coastal fishes, but that restoration and its benefits are sensitive to the dynamic seascapes in which restoration is conducted. Consideration of how seascape‐scale environmental variability affects the success of habitat restoration and subsequent ecosystem function will improve restoration outcomes and the provisioning of ecosystem services. [ABSTRACT FROM AUTHOR]

Published
2023
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25. The future of Blue Carbon science

Author

Macreadie, Peter I., Anton, Andrea, Raven, John A., Beaumont, Nicola, Connolly, Rod M., Friess, Daniel A., Kelleway, Jeffrey J., Kennedy, Hilary, Kuwae, Tomohiro, Lavery, Paul S., Lovelock, Catherine E., Smale, Dan A., Apostolaki, Eugenia T., Atwood, Trisha B., Baldock, Jeff, Bianchi, Thomas S., Chmura, Gail L., Eyre, Bradley D., Fourqurean, James W., Hall-Spencer, Jason M., Huxham, Mark, Hendriks, Iris E., Krause-Jensen, Dorte, Laffoley, Dan, Luisetti, Tiziana, Marbà, Núria, Masque, Pere, McGlathery, Karen J., Megonigal, J. Patrick, Murdiyarso, Daniel, Russell, Bayden D., Santos, Rui, Serrano, Oscar, Silliman, Brian R., Watanabe, Kenta, and Duarte, Carlos M.

Published
2019
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