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Tree community reassembly after selective and clear-cut logging in an Afro-tropical rainforest

Published on Oct 2, 2015in Israel Journal of Ecology & Evolution0.87
· DOI :10.1080/15659801.2015.1131479
Arthur A. Owiny3
Estimated H-index: 3
(University of Eastern Finland)
Abstract
Understanding the process of community reassembly is crucial for the conservation of biodiversity and rehabilitation of ecosystems. This study tested whether tree communities in logged forests follow an equilibrium (deterministic) or non-equilibrium (stochastic) model of succession. We assessed reassembly of tree communities in different size classes along a successional gradient consisting of nine differently aged successional forests, namely, four regenerating former clear-cuts (9–19 years), three selectively logged (42–43 years) and two primary forests (PFs) in Kibale National Park, Uganda. The results show that the forests are converging and undergoing reassembly towards PFs. The species composition of seedlings, saplings and poles declined in similarity to the PF with age but that of mature trees in the different successional stages increased towards the PFs. These differences in tree species composition among the different size classes might be due to dominance of some particular species. Recovery o...
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References59
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#1Arthur A. Owiny (University of Eastern Finland)H-Index: 3
#2Anu Valtonen (Kyoto University)H-Index: 4
Last. Heikki Roininen (University of Eastern Finland)H-Index: 32
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Predicting the recovery processes in tree communities after logging is critical when developing conservation strategies. We assessed the patterns in tree communities in logged and primary forests in Kibale National Park, Uganda, representing 9- to 19-year-old clear-cuts of former conifer plantations, 42- to 43-year-old logged forests and primary forests. Species density and diversity were lower and dominance higher in the 9- to 19-year-old forests compared to the 42- to 43-year-old forests or pr...
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#1Natalia Norden (Pontifical Xavierian University)H-Index: 20
#2Héctor A. Angarita (Pontifical Xavierian University)H-Index: 1
Last. Robin L. Chazdon (UConn: University of Connecticut)H-Index: 67
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Although forest succession has traditionally been approached as a deterministic process, successional trajectories of vegetation change vary widely, even among nearby stands with similar environmental conditions and disturbance histories. Here, we provide the first attempt, to our knowledge, to quantify predictability and uncertainty during succession based on the most extensive long-term datasets ever assembled for Neotropical forests. We develop a novel approach that integrates deterministic a...
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Prunus africana is a globally threatened indigenous medicinal tree species, and food for many primates. Its population has declined in Sub-Saharan Africa due to unsustainable harvest and poor protection. In this study, we determined the population density, population structure and regeneration status of P. africana in the former clear felled, selectively logged and primary forests of Kibale National Park, and assessed the effects of dense cover of Acanthus pubescens on its regeneration. Trees we...
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#1Geoffrey M. Malinga (University of Eastern Finland)H-Index: 6
#2Anu Valtonen (University of Eastern Finland)H-Index: 14
Last. Heikki Roininen (University of Eastern Finland)H-Index: 32
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#1Jess K. Zimmerman (UPR-RP: University of Puerto Rico, Río Piedras)H-Index: 47
#2James Aaron Hogan (UPR-RP: University of Puerto Rico, Río Piedras)H-Index: 5
Last. Nicholas Brokaw (UPR-RP: University of Puerto Rico, Río Piedras)H-Index: 33
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We experimentally manipulated key components of severe hurricane disturbance, canopy openness and detritus deposition, to determine the independent and interactive effects of these components on tree recruitment, forest structure, and diversity in a wet tropical forest in the Luquillo Experimental Forest, Puerto Rico. Canopy openness was increased by trimming branches, and we manipulated debris by adding or subtracting the trimmed materials to the trimming treatments, in a 2 � 2 factorial design...
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#1Margaret Nyafwono (University of Eastern Finland)H-Index: 3
#2Anu Valtonen (University of Eastern Finland)H-Index: 14
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Knowledge of the recovery of insect communities after forest disturbance in tropical Africa is very limited. Here, fruit-feeding butterflies in a tropical rain forest at Kibale National Park, Uganda, were used as a model system to uncover how, and how fast, insect communities recover after forest disturbance. We trapped butterflies monthly along a successional gradient for one year. Traps were placed in intact primary forest compartments, heavily logged forest compartments with and without arbor...
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#1Tiina Piiroinen (University of Eastern Finland)H-Index: 3
#2Philip Nyeko (MUK: Makerere University)H-Index: 13
Last. Heikki Roininen (University of Eastern Finland)H-Index: 32
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Gaps created 10 years ago by clearing of conifer plantations in Kibale National Park, Uganda, still experience very little tree regeneration. We studied the arrested succession by examining the survival of Neoboutonia macrocalyx Pax in different sized canopy gaps. We examined whether Neoboutonia seedlings can survive in gaps, which the tree rarely colonizes naturally and whether survival is limited by the size of the canopy opening, herbaceous climbers or insect folivory. A total of 384 seedling...
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#1Daisy H. Dent (University of Stirling)H-Index: 17
#2Saara J. DeWalt (Clemson University)H-Index: 28
Last. Julie S. Denslow (USFS: United States Forest Service)H-Index: 13
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Question Does species and functional composition of secondary tropical forests more closely follow a deterministic or a stochastic model of succession? Location The Barro Colorado Nature Monument (BCNM), central Panama. The BCNM comprises Barro Colorado Island (BCI) and five adjacent mainland peninsulas and is a mosaic of tropical old-growth (OG) and secondary forests (SF). Methods We studied the species and functional composition of seedling, sapling and adult tree communities in a chronosequen...
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#1Jeremy W. Fox (U of C: University of Calgary)H-Index: 24
A leading idea about how disturbances and other environmental fluctuations affect species diversity is the intermediate disturbance hypothesis (IDH). The IDH states that diversity of competing species is, or should be expected to be, maximized at intermediate frequencies and/or intensities of disturbance or environmental change. I argue that the IDH has been refuted on both empirical and theoretical grounds, and so should be abandoned. Empirical studies only rarely find the predicted humped dive...
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#1Yi DingH-Index: 10
#2Runguo ZangH-Index: 16
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A rapidly increasing effort to merge functional community ecology and phylogenetic biology has increased our understanding of community assembly. However, studies using both phylogenetic- and trait-based methods have been mainly conducted in old-growth forests, with fewer studies in human-disturbed communities, which play an increasingly important role in providing ecosystem services as primary forests are degraded. We used data from 18 1-ha plots in tropical old-growth forests and secondary for...
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