Disturbance and Tree Species Coexistence in Tropical Riparian Forest Fragments

1993 ◽  
Vol 3 (1) ◽  
pp. 1 ◽  
Author(s):  
Martin Kellman ◽  
Rosanne Tackaberry
Keyword(s):  
Tree Species ◽  
Species Coexistence ◽  
Riparian Forest ◽  
Forest Fragments

Ecological processes maintaining differential tree species distributions in an Australian subtropical rain forest: implications for models of species coexistence

2000 ◽  
Vol 16 (3) ◽  
pp. 387-415 ◽  
Author(s):  
Igor Debski ◽  
David F. R. P. Burslem ◽  
David Lamb
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Rain Forest ◽  
Large Scale ◽  
Species Coexistence ◽  
Common Species ◽  
Size Class ◽  
Differential Mortality ◽  
Mixed Composition ◽  
Large Scale Disturbance

All stems ≥ 1 cm dbh were measured, tagged, mapped and identified on a 1-ha plot of rain forest at Gambubal State Forest, south-east Queensland, Australia. The spatial patterns and size class distributions of 11 common tree species on the plot were assessed to search for mechanisms determining their distribution and abundance. The forest was species-poor in comparison to many lowland tropical forests and the common species are therefore present at relatively high densities. Despite this, only limited evidence was found for the operation of density-dependent processes at Gambubal. Daphnandra micrantha saplings were clumped towards randomly spaced adults, indicating a shift of distribution over time caused by differential mortality of saplings in these adult associated clumps. Ordination of the species composition in 25-m × 25-m subplots revealed vegetation gradients at that scale, which corresponded to slope across the plot. Adult basal area was dominated by a few large individuals of Sloanea woollsii but the comparative size class distributions and replacement probabilities of the 11 common species suggest that the forest will undergo a transition to a more mixed composition if current conditions persist. The current cohort of large S. woollsii individuals probably established after a large-scale disturbance event and the forest has not attained an equilibrium species composition.

scholarly journals Plântulas de espécies arbóreas na floresta ciliar do rio Mogi Guaçu, Pirassununga, SP, Brasil

Hoehnea ◽  
2021 ◽  
Vol 48 ◽  
Author(s):  
Israel Henrique Buttner Queiroz ◽  
Ricardo Augusto Gorne Viani ◽  
Renata Sebastiani
Keyword(s):  
River Basin ◽  
Plant Species ◽  
Tree Species ◽  
Riparian Forest ◽  
The State ◽  
Forest Area ◽  
Forest Community ◽  
Adult Individual ◽  
Morphological Aspects ◽  
Forest Remnant

RESUMO The permanence of a plant species in a forest community depends on its number of specimens and its distribution in the various sizes of individuals, including seedlings. Seedlings and seeds from a forest remnant in Pirassununga were collected and analyzed for the degree of threat, possible height of the adult individual, occurrence in phytophysiognomies and region and morphological aspects. 116 seedlings available in 39 morphospecies were collected, and the germination of collected seeds provided 40 species. The present study brought news regarding the morphological aspects, the identification and the distribution of seedlings of tree species in a riparian forest area in the Mogi Guaçu River Basin and in the State of São Paulo.

Dynamics of seedling populations and tree species coexistence in a forest: a simulation study

2006 ◽  
Vol 21 (3) ◽  
pp. 356-363 ◽  
Author(s):  
Akio Takenaka
Keyword(s):  
Simulation Study ◽  
Tree Species ◽  
Species Coexistence

scholarly journals Tree Species Composition, Structure, and Aboveground Wood Biomass of a Riparian Forest of the Lower Miranda River, Southern Pantanal, Brazil

2008 ◽  
Vol 43 (4) ◽  
pp. 397-411 ◽  
Author(s):  
Florian Wittmann ◽  
Bianca Thaís Zorzi ◽  
Fernando Augusto Tambelini Tizianel ◽  
Marcus Vinicius Santiago Urquiza ◽  
Rogério Rodrigues Faria ◽  
...  
Keyword(s):  
Species Composition ◽  
Tree Species ◽  
Riparian Forest ◽  
Wood Biomass ◽  
Tree Species Composition ◽  
Composition Structure

Natural disturbance and tree species coexistence in an old-growth beech - dwarf bamboo forest, southwestern Japan

1995 ◽  
Vol 6 (6) ◽  
pp. 875-886 ◽  
Author(s):  
Shin-Ichi Yamamoto ◽  
Naoyuki Nishimura ◽  
Kiyoshi Matsui
Keyword(s):  
Tree Species ◽  
Species Coexistence ◽  
Natural Disturbance ◽  
Dwarf Bamboo ◽  
Bamboo Forest ◽  
Old Growth

scholarly journals Pulling on multiple threads of evidence to reveal tree species coexistence

2021 ◽  
Author(s):  
Gordon G McNickle ◽  
Morgan V Ritzi ◽  
Kliffi M.S. Blackstone ◽  
John J Couture ◽  
Taylor Nelson ◽  
...  
Keyword(s):  
Tree Species ◽  
Species Coexistence ◽  
Analysis Data ◽  
The United States ◽  
United States Department ◽  
Hardwood Species ◽  
Niche Differences ◽  
The Usa ◽  
Multiple Threads ◽  
Occurrence Patterns

Understanding drivers of species coexistence is a central challenge in ecology. Coexistence cannot be observed directly, and while species co-occurrence in time and space is necessary for coexistence, it is not sufficient to prove coexistence. Species exclusion from a region is potentially observable, but can take decades to occur, and still might occur stochastically. Thus, ecologists generally use theory to identify indirect observations that are indicative of mechanisms driving coexistence or exclusion. Various methods have been developed to indirectly infer coexistence, each of which requires different data, and none of which are usually conclusive on their own. Here, we demonstrate agreement using three different approaches examining coexistence of multiple hardwood species. First, in an experimental planting of three mature tree species we found no relationship between productivity and species diversity, which could be due to a lack of niche differences among species. Second, we used modern coexistence theory to calculate niche and fitness differences for each pair of species, which confirmed the lack of niche differences among species, and showed high fitness differences that could create a neutral distribution of species in nature. Third, we used the United States Department of Agriculture Forest Inventory and Analysis data to examine co-occurrence patterns of our species across thousands of natural forest stands and found that indeed, these three species were distributed randomly throughout the USA. Given that these independent methods agree, we take this as strong evidence about a lack of coexistence.

scholarly journals Influence of Edaphic Attributes on the Distribution of Tree Species in a Riparian Forest in Southern Brazil

2019 ◽  
Vol 26 (4) ◽  
Author(s):  
Mônica Brucker Kelling ◽  
Maristela Machado Araujo ◽  
Daniele Guarienti Rorato
Keyword(s):  
Tree Species ◽  
Riparian Forest ◽  
Southern Brazil

scholarly journals Small Landscape Elements Double Connectivity in Highly Fragmented Areas of the Brazilian Atlantic Forest

2021 ◽  
Vol 9 ◽  
Author(s):  
Flávia Freire Siqueira ◽  
Dulcineia de Carvalho ◽  
Jonathan Rhodes ◽  
Carla L. Archibald ◽  
Vanessa Leite Rezende ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Riparian Forest ◽  
Landscape Connectivity ◽  
Agricultural Landscapes ◽  
Landscape Configuration ◽  
Individual Species ◽  
Forest Fragments ◽  
Landscape Elements ◽  
Habitat Patches ◽  
Seed Disperser

The Atlantic Forest in Brazil is a biodiversity hotspot, yet its diverse ecosystems and species are becoming increasingly threatened by habitat loss and extreme habitat fragmentation. Most habitat patches of Atlantic Forest are dispersed across agricultural landscapes (e.g., grazing and cropping) in relatively small and isolated fragments (80% < 50 ha). Forest fragments < 1 ha, scattered trees in pastures, tree lines on trenches and fences, and remnant riparian forest, collectively called here Small Landscape Elements (SLEs), are very common in this context. While these SLEs make up much of the Atlantic Forests footprint, very little is known about their role or impact on the persistence and conservation of species. In this study, we investigate the role of SLEs on landscape configuration, particularly their contribution toward landscape connectivity of individual species and the genetic flow of species between larger forest fragments. We randomly selected 20 buffers of 707 hectares within a 411,670 hectare area of the Atlantic Forest that was completely covered by forest in the past located in the south of Minas Gerais State, Brazil. The forest cover randomly varied between these buffers. We used graph theory to measure landscape connectivity as the probability of connectivity for different disperser movement types between landscape knots (habitat patches). We used three estimated dispersal distances in the models: pollen disperser insect (50 m), low-mobility seed disperser bird (100 m) and high-mobility seed disperser bird (760 m). The SLEs together increased the probability of connection by roughly 50%, for all model dispersers, if compared to a theoretical baseline landscape containing no SLEs. Of all SLEs, riparian forests contribute the most toward enhancing landscape connectivity. In these highly fragmented landscapes, such as the Atlantic Forest (>70%), the position of SLEs within the landscapes was more important than their respective areas for connectivity. Although the landscapes were deeply fragmented, we showed that the presence of SLEs can increase connectivity and reduce further biodiversity loss in the Atlantic Forest.

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