Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes
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...
Guardado en:
| Autores principales: | , , , , , , , |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Frontiers Media S.A.
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/f188f015ef9f4c6cbfe2ff93ccc568ab |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| id |
oai:doaj.org-article:f188f015ef9f4c6cbfe2ff93ccc568ab |
|---|---|
| record_format |
dspace |
| spelling |
oai:doaj.org-article:f188f015ef9f4c6cbfe2ff93ccc568ab2021-12-03T07:18:06ZBeta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes2296-774510.3389/fmars.2021.780268https://doaj.org/article/f188f015ef9f4c6cbfe2ff93ccc568ab2021-12-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.780268/fullhttps://doaj.org/toc/2296-7745Community 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.Nelson ValdiviaNelson ValdiviaJosé Garcés-VargasJosé Garcés-VargasIgnacio GarridoIgnacio GarridoIgnacio GarridoIván GómezIván GómezPirjo HuovinenPirjo HuovinenNelso P. NavarroNelso P. NavarroErasmo C. MacayaErasmo C. MacayaErasmo C. MacayaLuis Miguel PardoLuis Miguel PardoFrontiers Media S.A.articleneutral driftnichenull modelsphysiologypriority effectsspatial scaleScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
neutral drift niche null models physiology priority effects spatial scale Science Q General. Including nature conservation, geographical distribution QH1-199.5 |
| spellingShingle |
neutral drift niche null models physiology priority effects spatial scale Science Q General. Including nature conservation, geographical distribution QH1-199.5 Nelson Valdivia Nelson Valdivia José Garcés-Vargas José Garcés-Vargas Ignacio Garrido Ignacio Garrido Ignacio Garrido Iván Gómez Iván Gómez Pirjo Huovinen Pirjo Huovinen Nelso P. Navarro Nelso P. Navarro Erasmo C. Macaya Erasmo C. Macaya Erasmo C. Macaya Luis Miguel Pardo Luis Miguel Pardo Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes |
| 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 |
article |
| author |
Nelson Valdivia Nelson Valdivia José Garcés-Vargas José Garcés-Vargas Ignacio Garrido Ignacio Garrido Ignacio Garrido Iván Gómez Iván Gómez Pirjo Huovinen Pirjo Huovinen Nelso P. Navarro Nelso P. Navarro Erasmo C. Macaya Erasmo C. Macaya Erasmo C. Macaya Luis Miguel Pardo Luis Miguel Pardo |
| author_facet |
Nelson Valdivia Nelson Valdivia José Garcés-Vargas José Garcés-Vargas Ignacio Garrido Ignacio Garrido Ignacio Garrido Iván Gómez Iván Gómez Pirjo Huovinen Pirjo Huovinen Nelso P. Navarro Nelso P. Navarro Erasmo C. Macaya Erasmo C. Macaya Erasmo C. Macaya Luis Miguel Pardo Luis Miguel Pardo |
| author_sort |
Nelson Valdivia |
| title |
Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes |
| title_short |
Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes |
| title_full |
Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes |
| title_fullStr |
Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes |
| title_full_unstemmed |
Beta Diversity of Antarctic and Sub-Antarctic Benthic Communities Reveals a Major Role of Stochastic Assembly Processes |
| title_sort |
beta diversity of antarctic and sub-antarctic benthic communities reveals a major role of stochastic assembly processes |
| publisher |
Frontiers Media S.A. |
| publishDate |
2021 |
| url |
https://doaj.org/article/f188f015ef9f4c6cbfe2ff93ccc568ab |
| work_keys_str_mv |
AT nelsonvaldivia betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT nelsonvaldivia betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT josegarcesvargas betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT josegarcesvargas betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT ignaciogarrido betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT ignaciogarrido betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT ignaciogarrido betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT ivangomez betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT ivangomez betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT pirjohuovinen betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT pirjohuovinen betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT nelsopnavarro betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT nelsopnavarro betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT erasmocmacaya betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT erasmocmacaya betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT erasmocmacaya betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT luismiguelpardo betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses AT luismiguelpardo betadiversityofantarcticandsubantarcticbenthiccommunitiesrevealsamajorroleofstochasticassemblyprocesses |
| _version_ |
1718373848539201536 |