Tropical cyclones and island area shape species abundance distributions of local tree communities

Type Article
Date 2020-12
Language English
Author(s) Ibanez Thomas1, 2, 17, Keppel Gunnar3, 4, Baider Cleudia5, Birkinshaw Chris6, Vincent Florens Fb7, Laidlaw Melinda8, Menkes Christophe9, Parthasarathy Narayanaswamy10, Rajkumar Muthu10, 11, Ratovoson Fidy12, Rasingam Ladan13, Reza Ludovic12, Aiba Shin-Ichiro14, Webb Edward L15, Zang Rungo16, Birnbaum Philippe1, 2
Affiliation(s) 1 : Institut Agronomique néo-Calédonien (IAC), Equipe Sol & Végétation (SolVeg), BPA5, 98800 Nouméa, New Caledonia
2 : AMAP, CIRAD, CNRS, INRA, IRD, Univ Montpellier, Montpellier, France
3 : School of Natural and Built Environments and Future Industries Institute, University of South Australia, Mawson Lakes Campus, GPO Box 2471, Adelaide, South Australia 5001, Australia
4 : Biodiversity, Macroecology & Biogeography, University of Goettingen, Büsgenweg 1, 37077 Göttingen, Germany
5 : The Mauritius Herbarium, Agricultural Services, Ministry of Agro-Industry and Food Security, 80835, Réduit, Mauritius
6 : Missouri Botanical Garden - Programme Madagascar, Lot VP 31 Ankadibevava Anjohy, BP 3391, Antananarivo 101, Madagascar
7 : Tropical Island Biodiversity, Ecology and Conservation Pole of Research, Department of Biosciences and Ocean Studies, University of Mauritius, Réduit, Mauritius
8 : Queensland Herbarium, Department of Environment and Science, Toowong, 4066, Australia
9 : IRD, ENTROPIE (UMR 9220), BP A5, 98848 Nouméa Cedex, New Caledonia
10 : Department of Ecology and Environmental Sciences, Pondicherry University, Puducherry, 605014, India
11 : Tropical Forest Research Institute, Jabalpur, 482021, Madhya Pradesh, India
12 : Missouri Botanical Garden, Madagascar Research and Conservation Program, BP 3391, Antananarivo 101, Madagascar
13 : Botanical Survey of India, Deccan Regional Center, Hyderabad, 500 048 Telangana, India
14 : Graduate School of Science and Engineering, Kagoshima University, 890-0065 Kagoshima, Japan
15 : Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, 117543, Singapore
16 : Key laboratory of biodiversity conservation,the state forestry and grassland administration, Institute of Forest Ecology, Environment, and Protection, Chinese Academy of Forestry, Beijing, 100091 China
17 : Department of Biology, University of Hawai’i at Hilo, Hawai’i, USA
Source Oikos (0030-1299) (Wiley / Blackwell), 2020-12 , Vol. 129 , N. 12 , P. 1856-1866
DOI 10.1111/oik.07501
WOS© Times Cited 3
Keyword(s) area, disturbance, hurricane, isolation, rain forest, species abundance distribution (SAD), species-area relationship (SAR), species diversity, theory of island biogeography, tropical cyclone, typhoon
Abstract

Species abundance distributions (SADs) characterise the distribution of individuals among species. SADs have rarely been explored on islands and the ecological processes shaping SADs are still not fully understood. Notably, the relative importance of disturbance regime in shaping plant SADs remains poorly known. We investigate the relative importance of disturbance regime and island geography on the shape of SADs. We computed SADs for local tree communities in 1‐ha forest plots on 20 tropical islands in the Indo‐Pacific region. We used generalized linear models to analyse how the shape parameter of the gambin SAD model was related to the number of trees and the number of species. Regression analyses were also used to investigate how the shape of SADs, the number of trees, and the number of species were related to cyclone disturbance (power dissipation index) and geography (island area and isolation), with direct and indirect (i.e., through the number of trees and species) effects assessed using variance partitioning. Cyclone disturbance was the best predictor of the shape of SADs, with higher power dissipation index producing more lognormal‐like distributions. This effect was mostly due to cyclones increasing the number of trees and decreasing the number of species. Island area affected the shape of SADs through its effect on the number of species, and larger islands were associated with higher species richness and more logseries‐like distributions. The effect of cyclones was stronger on smaller islands. Our results illustrate that disturbances can affect SADs in complex ways; directly and indirectly by impacting the number of species and individuals in communities, and these effects may be moderated by island‐specific characteristics, such as island area or isolation. Our results therefore suggest that multiple, interacting processes shape SADs and that studying SADs has the potential to contribute important new insights to the field of island biogeography.

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Ibanez Thomas, Keppel Gunnar, Baider Cleudia, Birkinshaw Chris, Vincent Florens Fb, Laidlaw Melinda, Menkes Christophe, Parthasarathy Narayanaswamy, Rajkumar Muthu, Ratovoson Fidy, Rasingam Ladan, Reza Ludovic, Aiba Shin-Ichiro, Webb Edward L, Zang Rungo, Birnbaum Philippe (2020). Tropical cyclones and island area shape species abundance distributions of local tree communities. Oikos, 129(12), 1856-1866. Publisher's official version : https://doi.org/10.1111/oik.07501 , Open Access version : https://archimer.ifremer.fr/doc/00643/75487/