1
|
Estrada-Villegas S, Stevenson PR, López O, DeWalt SJ, Comita LS, Dent DH. Animal seed dispersal recovery during passive restoration in a forested landscape. Philos Trans R Soc Lond B Biol Sci 2023; 378:20210076. [PMID: 36373921 PMCID: PMC9661942 DOI: 10.1098/rstb.2021.0076] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
Seed dispersal by animals is key for restoration of tropical forests because it maintains plant diversity and accelerates community turnover. Therefore, changes in seed dispersal during forest restoration can indicate the recovery of species interactions, and yet these changes are rarely considered in forest restoration planning. In this study, we examined shifts in the importance of different seed dispersal modes during passive restoration in a tropical chronosequence spanning more than 100 years, by modelling the proportion of trees dispersed by bats, small birds, large birds, flightless mammals and abiotic means as a function of forest age. Contrary to expectations, tree species dispersed by flightless mammals dominated after 20 years of regeneration, and tree richness and abundance dispersed by each mode mostly recovered to old growth levels between 40 and 70 years post-abandonment. Seed dispersal by small birds declined over time during regeneration, while bat dispersal played a minor role throughout all stages of succession. Results suggest that proximity to old growth forests, coupled with low hunting, explained the prevalence of seed dispersal by animals, especially by flightless mammals at this site. We suggest that aspects of seed dispersal should be monitored when restoring forest ecosystems to evaluate the reestablishment of species interactions. This article is part of the theme issue 'Understanding forest landscape restoration: reinforcing scientific foundations for the UN Decade on Ecosystem Restoration'.
Collapse
Affiliation(s)
- Sergio Estrada-Villegas
- Yale School of the Environment, Yale University, New Haven, CT 06511, USA
- New York Botanical Garden, Bronx, NY 10458, USA
- Smithsonian Tropical Research Institute, Balboa, Panamá
| | - Pablo R. Stevenson
- CIEM, Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia 111711
| | - Omar López
- Smithsonian Tropical Research Institute, Balboa, Panamá
- Instituto de Investigaciones Científicas y Servicios de Alta Tecnología, Panamá, Panamá
| | - Saara J. DeWalt
- Department of Biological Sciences, Clemson University, Clemson, SC 29634, USA
| | - Liza S. Comita
- Yale School of the Environment, Yale University, New Haven, CT 06511, USA
- Smithsonian Tropical Research Institute, Balboa, Panamá
| | - Daisy H. Dent
- Smithsonian Tropical Research Institute, Balboa, Panamá
- Max Planck Institute for Animal Behaviour, Konstanz 78315, Germany
- Department of Environmental Systems Science, ETH Zürich 8902, Switzerland
| |
Collapse
|
2
|
Murphy HT, Bradford MG. The role of big trees and abundant species in driving spatial patterns of species richness in an Australian tropical rainforest. Ecol Evol 2022; 12:e9324. [PMID: 36188495 PMCID: PMC9486822 DOI: 10.1002/ece3.9324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/08/2022] [Accepted: 08/30/2022] [Indexed: 11/10/2022] Open
Affiliation(s)
- Helen T. Murphy
- CSIRO, Australian Tropical Sciences and Innovation Precinct James Cook University Townsville Queensland Australia
| | | |
Collapse
|
3
|
Tonos J, Razafindratsima OH, Fenosoa ZSE, Dunham AE. Individual‐based networks reveal the highly skewed interactions of a frugivore mutualist with individual plants in a diverse community. OIKOS 2021. [DOI: 10.1111/oik.08539] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jadelys Tonos
- Rice Univ., Biosciences Dept Houston TX USA
- Centre ValBio, Ranomafana National Park Ifanadiana Madagascar
| | - Onja H. Razafindratsima
- Centre ValBio, Ranomafana National Park Ifanadiana Madagascar
- Dept of Integrative Biology, Univ. of California Berkeley CA USA
| | - Zo Samuel Ella Fenosoa
- Centre ValBio, Ranomafana National Park Ifanadiana Madagascar
- Ecole Doctorale Sciences de la Vie et de l'Environnement, Univ. d'Antananarivo Antananarivo Madagascar
| | - Amy E. Dunham
- Rice Univ., Biosciences Dept Houston TX USA
- Centre ValBio, Ranomafana National Park Ifanadiana Madagascar
| |
Collapse
|
4
|
Song X, Lim JY, Yang J, Luskin MS. When do Janzen-Connell effects matter? A phylogenetic meta-analysis of conspecific negative distance and density dependence experiments. Ecol Lett 2020; 24:608-620. [PMID: 33382527 DOI: 10.1111/ele.13665] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/18/2020] [Accepted: 11/25/2020] [Indexed: 12/24/2022]
Abstract
The Janzen-Connell (J-C) hypothesis suggests that specialised natural enemies cause distance- or density-dependent mortality among host plants and is regarded as an important mechanism for species coexistence. However, there remains debate about whether this phenomenon is widespread and how variation is structured across taxa and life stages. We performed the largest meta-analysis of experimental studies conducted under natural settings to date. We found little evidence of distance-dependent or density-dependent mortality when grouping all types of manipulations. Our analysis also reveals very large variation in response among species, with 38.5% of species even showing positive responses to manipulations. However, we found a strong signal of distance-dependent mortality among seedlings but not seed experiments, which we attribute to (a) seedlings sharing susceptible tissues with adults (leaves, wood, roots), (b) seedling enemies having worse dispersal than seed enemies and (c) seedlings having fewer physical and chemical defences than seeds. Both density- and distance-dependent mortality showed large variation within genera and families, suggesting that J-C effects are not strongly phylogenetically conserved. There were no clear trends with latitude, rainfall or study duration. We conclude that J-C effects may not be as pervasive as widely thought. Understanding the variation in J-C effects provides opportunities for new discoveries that will refine our understanding of J-C effects and its role in species coexistence.
Collapse
Affiliation(s)
- Xiaoyang Song
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan, 666303, China.,Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla, 666303, China
| | - Jun Ying Lim
- School of Biological Sciences, Nanyang Technological University, Singapore
| | - Jie Yang
- Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan, 666303, China.,Center of Plant Ecology, Core Botanical Gardens, Chinese Academy of Sciences, Mengla, 666303, China
| | - Matthew Scott Luskin
- School of Biological Sciences, University of Queensland, Brisbane, Qld., 4072, Australia
| |
Collapse
|
5
|
Affiliation(s)
- Rafał Zwolak
- Department of Systematic Zoology Faculty of Biology Adam Mickiewicz University Poznań Poland
| | - Andrew Sih
- Department of Environmental Science and Policy University of California at Davis Davis CA USA
| |
Collapse
|
6
|
Masaki T, Nakashizuka T, Niiyama K, Tanaka H, Iida S, Bullock JM, Naoe S. Impact of the spatial uncertainty of seed dispersal on tree colonization dynamics in a temperate forest. OIKOS 2019. [DOI: 10.1111/oik.06236] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takashi Masaki
- Forestry and Forest Products Research Inst., Matsunosato 1, Tsukuba JP‐305‐8687 Ibaraki Japan
| | | | - Kaoru Niiyama
- Forestry and Forest Products Research Inst., Matsunosato 1, Tsukuba JP‐305‐8687 Ibaraki Japan
| | - Hiroshi Tanaka
- Forestry and Forest Products Research Inst., Matsunosato 1, Tsukuba JP‐305‐8687 Ibaraki Japan
| | - Shigeo Iida
- Kyushu Research Center, Forestry and Forest Products Research Inst Kumamoto Japan
| | | | - Shoji Naoe
- Tohoku Research Center, Forestry and Forest Products Research Inst Iwate Japan
| |
Collapse
|
7
|
Sugiyama A, Comita LS, Masaki T, Condit R, Hubbell SP. Resolving the paradox of clumped seed dispersal: positive density and distance dependence in a bat-dispersed species. Ecology 2018; 99:2583-2591. [PMID: 30182375 DOI: 10.1002/ecy.2512] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 08/06/2018] [Accepted: 08/20/2018] [Indexed: 11/12/2022]
Abstract
One of the hypothesized benefits of seed dispersal is to escape density- and distance-responsive, host-specific, natural enemies near maternal plants where conspecific seed and seedling densities are high. Such high conspecific neighbor densities typically result in lower offspring growth and survival (i.e., negative density-dependent effects), yet many dispersal modes result in clumped seed distributions. New World leaf-nosed bats transport fruits to their feeding roosts and deposit seeds, thereby creating high-density seed/seedling patches beneath feeding roosts in heterospecific trees away from maternal trees, which seemingly nullifies a key benefit of seed dispersal. Such dispersal may still be adaptive if negative density-dependent effects are reduced under feeding roosts or if the benefit of being dispersed away from maternal trees outweighs negative effects of conspecific seed/seedling density below roosts. We mapped the entire post-germination population of a bat-dispersed tree species Calophyllum longifolium (Calophyllaceae) in a 50-ha plot on Barro Colorado Island, Panama in each of three successive years. We tested two hypotheses: (1) distance-dependent effects are stronger than density-dependent effects on seedling performance because seedlings far from conspecific adults are more likely to escape natural enemies even when at high densities and (2) negative density-dependent effects will be reduced far from vs. near conspecific adults. Density and distance were naturally decoupled, as expected. However, in contrast to our expectation, we found positive density effects on seedling survival and density-dependent effects did not differ with distance from conspecific adults. Both density and distance had positive effects on seedling survival when considered together, while only year had a significant effect on seedling growth. Thus, both being dispersed under bat feeding roosts and escaping the vicinity of conspecific adults were beneficial for C. longifolium seedling survival, supporting the directed dispersal and escape hypotheses, respectively. Despite resulting in high densities of conspecific seedlings, favorable habitat under bat feeding roosts and lack of negative density-dependent effects appear to provide evolutionary advantages in C. longifolium.
Collapse
Affiliation(s)
- Anna Sugiyama
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, 90095, USA.,Forestry and Forest Products Research Institute, Tsukuba, Ibaraki, 305-8687, Japan.,Yale School of Forestry and Environmental Studies, Yale University, New Haven, Connecticut, 06511, USA
| | - Liza S Comita
- Yale School of Forestry and Environmental Studies, Yale University, New Haven, Connecticut, 06511, USA.,Smithsonian Tropical Research Institute, Unit 0948, Panama City, Panama
| | - Takashi Masaki
- Forestry and Forest Products Research Institute, Tsukuba, Ibaraki, 305-8687, Japan
| | - Richard Condit
- Field Museum of Natural History, Chicago, Illinois, 60605, USA.,Morton Arboretum, Lisle, Illinois, 60532, USA
| | - Stephen P Hubbell
- Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California, 90095, USA.,Smithsonian Tropical Research Institute, Unit 0948, Panama City, Panama
| |
Collapse
|
8
|
Rüger N, Comita LS, Condit R, Purves D, Rosenbaum B, Visser MD, Wright S, Wirth C. Beyond the fast–slow continuum: demographic dimensions structuring a tropical tree community. Ecol Lett 2018; 21:1075-1084. [DOI: 10.1111/ele.12974] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 11/14/2017] [Accepted: 03/30/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Nadja Rüger
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e 04103 Leipzig Germany
- Smithsonian Tropical Research Institute Apartado0843‐03092 Ancón Panama
| | - Liza S. Comita
- Smithsonian Tropical Research Institute Apartado0843‐03092 Ancón Panama
- School of Forestry & Environmental Studies Yale University New Haven CT06511 USA
| | - Richard Condit
- Field Museum of Natural History 1400 S. Lake Shore Dr. Chicago IL60605 USA
- Morton Arboretum 4100 Illinois Rte. 53 Lisle IL60532 USA
| | | | - Benjamin Rosenbaum
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e 04103 Leipzig Germany
- Institute of Biodiversity Friedrich Schiller University Jena Dornburger Str. 159 07743 Jena Germany
| | - Marco D. Visser
- Department of Ecology and Evolutionary Biology Princeton University Princeton NJ08544 USA
| | - S.J Wright
- Smithsonian Tropical Research Institute Apartado0843‐03092 Ancón Panama
| | - Christian Wirth
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐Leipzig Deutscher Platz 5e 04103 Leipzig Germany
- AG Spezielle Botanik und Funktionelle Biodiversität Universität Leipzig Johannisallee 21 04103 Leipzig Germany
- Max‐Planck‐Institute for Biogeochemistry Hans‐Knöll‐Str. 10 07743 Jena Germany
| |
Collapse
|
9
|
Kendig AE, Borer ET, Mitchell CE, Power AG, Seabloom EW. Characteristics and drivers of plant virus community spatial patterns in US west coast grasslands. OIKOS 2017. [DOI: 10.1111/oik.04178] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Amy E. Kendig
- Dept of Ecology; Evolution and Behavior, Univ. of Minnesota; St. Paul MN 55108 USA
| | - Elizabeth T. Borer
- Dept of Ecology; Evolution and Behavior, Univ. of Minnesota; St. Paul MN 55108 USA
| | - Charles E. Mitchell
- Curriculum for the Environment and Ecology and Dept of Biology; Univ. of North Carolina at Chapel Hill; Chapel Hill NC USA
| | - Alison G. Power
- Dept of Ecology and Evolutionary Biology; Cornell Univ.; Ithaca NY USA
| | - Eric W. Seabloom
- Dept of Ecology; Evolution and Behavior, Univ. of Minnesota; St. Paul MN 55108 USA
| |
Collapse
|
10
|
Du Y, Queenborough SA, Chen L, Wang Y, Mi X, Ma K, Comita LS. Intraspecific and phylogenetic density-dependent seedling recruitment in a subtropical evergreen forest. Oecologia 2017; 184:193-203. [PMID: 28238049 DOI: 10.1007/s00442-017-3842-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 02/11/2017] [Indexed: 11/30/2022]
Abstract
Recent evidence suggests that plant performance can be influenced by the phylogenetic diversity of neighboring plants. However, no study to date has examined the effect of such phylogenetic density dependence on the transition from seed to seedling. Using 6 years of data on seedling recruitment and seed rain of 13 species from 130 stations (one 0.5 m2 seed trap and three adjacent 1 m2 seedling plots) in a subtropical evergreen forest, we asked: (1) Does negative density dependence act across seed to seedling stages? (2) Is there evidence for phylogenetic density dependence during the seed to seedling transition? (3) Does the strength of density dependence vary among years? Generalized linear mixed-effects models were used to model seed to seedling transition as a function of conspecific seed and seedling densities, heterospecific seed and seedling densities, and mean phylogenetic distance of heterospecific seeds and seedling. Conspecific seed density had a significant negative effect on seedling transition rates for 12 of 13 focal species. In contrast, conspecific seedling density had a positive effect for 7 species, suggesting species-specific habitat preferences. Few species were significantly affected by the density or phylogenetic relatedness of heterospecific seeds and seedlings. Only conspecific seed density effects varied among years for most focal species. Overall, our results reveal that conspecific seed and seedling densities play a more important role than the density or relatedness of heterospecific seeds and seedlings during the seed to seedling stage, suggesting that species-specific seed predators, along with habitat preferences, may contribute to diversity maintenance in this forest.
Collapse
Affiliation(s)
- Yanjun Du
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Simon A Queenborough
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, 06511, USA
| | - Lei Chen
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Yunquan Wang
- College of Life Sciences, Beijing Normal University, Beijing, 100875, China
| | - Xiangcheng Mi
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Keping Ma
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China.
| | - Liza S Comita
- School of Forestry and Environmental Studies, Yale University, New Haven, CT, 06511, USA.,Smithsonian Tropical Research Institute, Box 0843-03092, Balboa, Ancon, Panama
| |
Collapse
|