Global patterns of kelp forest change over the past half-century
Kelp forests (Order Laminariales) form key biogenic habitats in coastal regions of temperate and Arctic seas worldwide, providing ecosystem services valued in the range of billions of dollars annually. Although local evidence suggests that kelp forests are increasingly threatened by a variety of str...
Published in: | Proceedings of the National Academy of Sciences |
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Online Access: | http://hdl.handle.net/2440/104615 https://doi.org/10.1073/pnas.1606102113 |
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ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/104615 2023-12-24T10:14:30+01:00 Global patterns of kelp forest change over the past half-century Krumhansl, K. Okamoto, D. Rassweiler, A. Novak, M. Bolton, J. Cavanaugh, K. Connell, S. Johnson, C. Konar, B. Ling, S. Micheli, F. Norderhaug, K. Pérez-Matus, A. Sousa-Pinto, I. Reed, D. Salomon, A. Shears, N. Wernberg, T. Anderson, R. Barrett, N. 2016 http://hdl.handle.net/2440/104615 https://doi.org/10.1073/pnas.1606102113 en eng National Academy of Sciences Proceedings of the National Academy of Sciences of USA, 2016; 113(48):13785-13790 0027-8424 1091-6490 http://hdl.handle.net/2440/104615 doi:10.1073/pnas.1606102113 Connell, S. [0000-0002-5350-6852] © The Author(s) http://dx.doi.org/10.1073/pnas.1606102113 Laminariales climate change coastal ecosystems global change kelp forest Journal article 2016 ftunivadelaidedl https://doi.org/10.1073/pnas.1606102113 2023-11-27T23:25:47Z Kelp forests (Order Laminariales) form key biogenic habitats in coastal regions of temperate and Arctic seas worldwide, providing ecosystem services valued in the range of billions of dollars annually. Although local evidence suggests that kelp forests are increasingly threatened by a variety of stressors, no comprehensive global analysis of change in kelp abundances currently exists. Here, we build and analyze a global database of kelp time series spanning the past half-century to assess regional and global trends in kelp abundances. We detected a high degree of geographic variation in trends, with regional variability in the direction and magnitude of change far exceeding a small global average decline (instantaneous rate of change = -0.018 y-1). Our analysis identified declines in 38% of ecoregions for which there are data (-0.015 to -0.18 y-1), increases in 27% of ecoregions (0.015 to 0.11 y-1), and no detectable change in 35% of ecoregions. These spatially variable trajectories reflected regional differences in the drivers of change, uncertainty in some regions owing to poor spatial and temporal data coverage, and the dynamic nature of kelp populations. We conclude that although global drivers could be affecting kelp forests at multiple scales, local stressors and regional variation in the effects of these drivers dominate kelp dynamics, in contrast to many other marine and terrestrial foundation species. Kira A. Krumhansl, Daniel K. Okamoto, Andrew Rassweiler, Mark Novak, John J. Bolton … Sean D. Connell … et al. Article in Journal/Newspaper Arctic Climate change The University of Adelaide: Digital Library Arctic Bolton ENVELOPE(-62.967,-62.967,-65.017,-65.017) Novak ENVELOPE(161.286,161.286,-77.284,-77.284) Kira ENVELOPE(155.386,155.386,50.311,50.311) Proceedings of the National Academy of Sciences 113 48 13785 13790 |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Laminariales climate change coastal ecosystems global change kelp forest |
spellingShingle |
Laminariales climate change coastal ecosystems global change kelp forest Krumhansl, K. Okamoto, D. Rassweiler, A. Novak, M. Bolton, J. Cavanaugh, K. Connell, S. Johnson, C. Konar, B. Ling, S. Micheli, F. Norderhaug, K. Pérez-Matus, A. Sousa-Pinto, I. Reed, D. Salomon, A. Shears, N. Wernberg, T. Anderson, R. Barrett, N. Global patterns of kelp forest change over the past half-century |
topic_facet |
Laminariales climate change coastal ecosystems global change kelp forest |
description |
Kelp forests (Order Laminariales) form key biogenic habitats in coastal regions of temperate and Arctic seas worldwide, providing ecosystem services valued in the range of billions of dollars annually. Although local evidence suggests that kelp forests are increasingly threatened by a variety of stressors, no comprehensive global analysis of change in kelp abundances currently exists. Here, we build and analyze a global database of kelp time series spanning the past half-century to assess regional and global trends in kelp abundances. We detected a high degree of geographic variation in trends, with regional variability in the direction and magnitude of change far exceeding a small global average decline (instantaneous rate of change = -0.018 y-1). Our analysis identified declines in 38% of ecoregions for which there are data (-0.015 to -0.18 y-1), increases in 27% of ecoregions (0.015 to 0.11 y-1), and no detectable change in 35% of ecoregions. These spatially variable trajectories reflected regional differences in the drivers of change, uncertainty in some regions owing to poor spatial and temporal data coverage, and the dynamic nature of kelp populations. We conclude that although global drivers could be affecting kelp forests at multiple scales, local stressors and regional variation in the effects of these drivers dominate kelp dynamics, in contrast to many other marine and terrestrial foundation species. Kira A. Krumhansl, Daniel K. Okamoto, Andrew Rassweiler, Mark Novak, John J. Bolton … Sean D. Connell … et al. |
format |
Article in Journal/Newspaper |
author |
Krumhansl, K. Okamoto, D. Rassweiler, A. Novak, M. Bolton, J. Cavanaugh, K. Connell, S. Johnson, C. Konar, B. Ling, S. Micheli, F. Norderhaug, K. Pérez-Matus, A. Sousa-Pinto, I. Reed, D. Salomon, A. Shears, N. Wernberg, T. Anderson, R. Barrett, N. |
author_facet |
Krumhansl, K. Okamoto, D. Rassweiler, A. Novak, M. Bolton, J. Cavanaugh, K. Connell, S. Johnson, C. Konar, B. Ling, S. Micheli, F. Norderhaug, K. Pérez-Matus, A. Sousa-Pinto, I. Reed, D. Salomon, A. Shears, N. Wernberg, T. Anderson, R. Barrett, N. |
author_sort |
Krumhansl, K. |
title |
Global patterns of kelp forest change over the past half-century |
title_short |
Global patterns of kelp forest change over the past half-century |
title_full |
Global patterns of kelp forest change over the past half-century |
title_fullStr |
Global patterns of kelp forest change over the past half-century |
title_full_unstemmed |
Global patterns of kelp forest change over the past half-century |
title_sort |
global patterns of kelp forest change over the past half-century |
publisher |
National Academy of Sciences |
publishDate |
2016 |
url |
http://hdl.handle.net/2440/104615 https://doi.org/10.1073/pnas.1606102113 |
long_lat |
ENVELOPE(-62.967,-62.967,-65.017,-65.017) ENVELOPE(161.286,161.286,-77.284,-77.284) ENVELOPE(155.386,155.386,50.311,50.311) |
geographic |
Arctic Bolton Novak Kira |
geographic_facet |
Arctic Bolton Novak Kira |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_source |
http://dx.doi.org/10.1073/pnas.1606102113 |
op_relation |
Proceedings of the National Academy of Sciences of USA, 2016; 113(48):13785-13790 0027-8424 1091-6490 http://hdl.handle.net/2440/104615 doi:10.1073/pnas.1606102113 Connell, S. [0000-0002-5350-6852] |
op_rights |
© The Author(s) |
op_doi |
https://doi.org/10.1073/pnas.1606102113 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
113 |
container_issue |
48 |
container_start_page |
13785 |
op_container_end_page |
13790 |
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1786194580809449472 |