Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx
Community assembly is the result of both, deterministic and stochastic processes. The former encompasses niche-based local-scale mechanisms such as environmental filtering and biotic interactions; the latter includes ecological drift, probabilistic colonisation, and random extinctions. Using standar...
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ftfrontimediafig:oai:figshare.com:article/17120807 2023-05-15T13:58:46+02:00 Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx Nelson Valdivia José Garcés-Vargas Ignacio Garrido Iván Gómez Pirjo Huovinen Nelso P. Navarro Erasmo C. Macaya Luis Miguel Pardo 2021-12-03T04:56:02Z https://doi.org/10.3389/fmars.2021.780268.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Beta_Diversity_of_Antarctic_and_Sub-Antarctic_Benthic_Communities_Reveals_a_Major_Role_of_Stochastic_Assembly_Processes_docx/17120807 unknown doi:10.3389/fmars.2021.780268.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Beta_Diversity_of_Antarctic_and_Sub-Antarctic_Benthic_Communities_Reveals_a_Major_Role_of_Stochastic_Assembly_Processes_docx/17120807 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering neutral drift niche null models physiology priority effects spatial scale Dataset 2021 ftfrontimediafig https://doi.org/10.3389/fmars.2021.780268.s001 2021-12-09T00:03:32Z Community assembly is the result of both, deterministic and stochastic processes. The former encompasses niche-based local-scale mechanisms such as environmental filtering and biotic interactions; the latter includes ecological drift, probabilistic colonisation, and random extinctions. Using standardised sampling protocols, we show that the spatial variation in species composition (beta diversity) of shallow subtidal macrobenthic communities of sub-Antarctic (Strait of Magellan and Yendegaia Fjord [Beagle Channel]) and Antarctic (Fildes Bay [King George Island, West Antarctic Peninsula]) localities reflects a high contribution of stochastic processes to community assembly. Null model analyses indicated that random sampling from species pools of different sizes drove the observed among-locality differences in incidence- and abundance-based beta diversity. We analysed a normalised stochasticity ratio (NST), which delimits between more deterministic (<50%) and more stochastic (>50%) assembly. NST was notably larger than 50%, with mean values of 69.5% (95% CI = 69.2–69.8%), 62.5% (62.1–62.9%), and 72.8% (72.5–73.2%) in Strait of Magellan, Yendegaia Fjord, and Fildes Bay, respectively. Accordingly, environmental factors, such as depth, seawater temperature, salinity, and underwater light penetration, accounted for a small fraction of the spatial variation in community composition across the three localities. In this region, therefore, stochastic processes could have stronger effects on community assembly than deterministic niche-based factors. As anthropogenic biotic homogenisation continues apace, our study can give useful insights into the major ecological processes in Southern Ocean’ coastal marine communities. Dataset Antarc* Antarctic Antarctic Peninsula King George Island Southern Ocean Frontiers: Figshare Antarctic Southern Ocean Antarctic Peninsula King George Island Fildes ENVELOPE(-58.817,-58.817,-62.217,-62.217) |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering neutral drift niche null models physiology priority effects spatial scale |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering neutral drift niche null models physiology priority effects spatial scale Nelson Valdivia José Garcés-Vargas Ignacio Garrido Iván Gómez Pirjo Huovinen Nelso P. Navarro Erasmo C. Macaya Luis Miguel Pardo Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering neutral drift niche null models physiology priority effects spatial scale |
description |
Community assembly is the result of both, deterministic and stochastic processes. The former encompasses niche-based local-scale mechanisms such as environmental filtering and biotic interactions; the latter includes ecological drift, probabilistic colonisation, and random extinctions. Using standardised sampling protocols, we show that the spatial variation in species composition (beta diversity) of shallow subtidal macrobenthic communities of sub-Antarctic (Strait of Magellan and Yendegaia Fjord [Beagle Channel]) and Antarctic (Fildes Bay [King George Island, West Antarctic Peninsula]) localities reflects a high contribution of stochastic processes to community assembly. Null model analyses indicated that random sampling from species pools of different sizes drove the observed among-locality differences in incidence- and abundance-based beta diversity. We analysed a normalised stochasticity ratio (NST), which delimits between more deterministic (<50%) and more stochastic (>50%) assembly. NST was notably larger than 50%, with mean values of 69.5% (95% CI = 69.2–69.8%), 62.5% (62.1–62.9%), and 72.8% (72.5–73.2%) in Strait of Magellan, Yendegaia Fjord, and Fildes Bay, respectively. Accordingly, environmental factors, such as depth, seawater temperature, salinity, and underwater light penetration, accounted for a small fraction of the spatial variation in community composition across the three localities. In this region, therefore, stochastic processes could have stronger effects on community assembly than deterministic niche-based factors. As anthropogenic biotic homogenisation continues apace, our study can give useful insights into the major ecological processes in Southern Ocean’ coastal marine communities. |
format |
Dataset |
author |
Nelson Valdivia José Garcés-Vargas Ignacio Garrido Iván Gómez Pirjo Huovinen Nelso P. Navarro Erasmo C. Macaya Luis Miguel Pardo |
author_facet |
Nelson Valdivia José Garcés-Vargas Ignacio Garrido Iván Gómez Pirjo Huovinen Nelso P. Navarro Erasmo C. Macaya Luis Miguel Pardo |
author_sort |
Nelson Valdivia |
title |
Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx |
title_short |
Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx |
title_full |
Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx |
title_fullStr |
Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx |
title_full_unstemmed |
Data_Sheet_1_Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes.docx |
title_sort |
data_sheet_1_beta diversity of antarctic and sub-antarctic benthic communities reveals a major role of stochastic assembly processes.docx |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.780268.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Beta_Diversity_of_Antarctic_and_Sub-Antarctic_Benthic_Communities_Reveals_a_Major_Role_of_Stochastic_Assembly_Processes_docx/17120807 |
long_lat |
ENVELOPE(-58.817,-58.817,-62.217,-62.217) |
geographic |
Antarctic Southern Ocean Antarctic Peninsula King George Island Fildes |
geographic_facet |
Antarctic Southern Ocean Antarctic Peninsula King George Island Fildes |
genre |
Antarc* Antarctic Antarctic Peninsula King George Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula King George Island Southern Ocean |
op_relation |
doi:10.3389/fmars.2021.780268.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Beta_Diversity_of_Antarctic_and_Sub-Antarctic_Benthic_Communities_Reveals_a_Major_Role_of_Stochastic_Assembly_Processes_docx/17120807 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2021.780268.s001 |
_version_ |
1766267113180233728 |