Impacts of recruitment limitation and canopy disturbance on tropical tree species richness

Köhler, Peter; Huth, Andreas

doi:10.1016/j.ecolmodel.2006.11.023

Cited by 30 publications

(16 citation statements)

References 37 publications

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“…The high species richness observed in D1 is because it is an area with highly disturbed community and large canopy gaps. This is similar to earlier observations that in natural conditions, disturbances either caused naturally or anthropogenically play an ideal role in enhancing the species richness (Köhler and Huth 2007). Hubbell et al (1999) studies on plant species richness at Barro Colorado Island, Panama show high species richness in the quadrants containing gaps than non-gap quadrants.…”

Section: Species Richnesssupporting

confidence: 82%

Assessing forest canopy closure in a geospatial medium to address management concerns for tropical islands—Southeast Asia

Prasad

Nagabhatla

Reddy³

et al. 2009

Environ Monit Assess

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The present study outlines an approach to classify forest density and to estimate canopy closure of the forest of the Andaman and Nicobar archipelago. The vector layers generated for the study area using satellite data was validated with the field knowledge of the surveyed ground control points. The methodology adopted in this present analysis is three-tiered. First, the density stratification into five zones using visual interpretation for the complete archipelago. In the second step, we identified two island groups from the Andaman to investigate and compare the forest strata density. The third and final step involved more of a localised phytosociological module that focused on the North Andaman Islands. The results based on the analysis of the high-resolution satellite data show that more than 75% of the mangroves are under high- to very high-density canopy class. The framework developed would serve as a significant measure to forest health and evaluate management concerns whilst addressing issues such as gap identification, conservation prioritisation and disaster management--principally to the post-tsunami assessment and analysis.

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Section: Species Richnesssupporting

confidence: 82%

Assessing forest canopy closure in a geospatial medium to address management concerns for tropical islands—Southeast Asia

Prasad

Nagabhatla

Reddy³

et al. 2009

Environ Monit Assess

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“…As timber extraction is ubiquitously performed in the Zona Maya, this activity could slowly erode species richness until a threshold is reached in which plant diversity drops. The reduction in tree diversity could be associated with changes in canopy openness and the differential recruitment of species (Huth and Ditzer 2001;Köhler and Huth 2007). Under logging programs, this loss of species is a challenge for managers.…”

Section: Discussionmentioning

confidence: 98%

Differential diameter-size effects of forest management on tree species richness and community structure: implications for conservation

2011

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In this paper we tested the hypothesis that logging effects in the adult tree community reverberate upon the regeneration contingent. We examined the differences on the tree community between forest reserves and 10 year-old logged areas in the Yucatan Peninsula. We used a paired design in three independent sites to estimate the effects of logging on tree species richness, diversity, composition and structure. Analyses were conducted differentiating individuals of four diameter-size classes: 1-5, 5-10, 10-25, and [25 cm DBH. We found out that there were differential effects by size. Species richness in the smaller and larger diameter-size classes was significantly lower in logged areas. Floristic composition was also different between logged and unlogged areas, with a trend towards more secondary forest associated species and less primary forest associated species in logged areas, and a higher density of species represented by a single individual in unlogged reserves. In terms of structure, trees DBH \10 cm, lianas, and re-sprouting stumps were more abundant in logged areas. Our findings suggest that 10 years after logging, harvested areas show alterations in structure, and potentially a reduction in species richness. We suggest that to make timber extraction and forest conservation compatible at this site, it is necessary to gain a better understanding of the ecology and regeneration requirements of the less abundant species, and to assess whether current logging practices might hinder their permanence in the study area.

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“…More specifically, if species are unable to reach all suitable patches in the landscape, species turnover among regenerating patches of forests may be higher than within undisturbed forest (Hubbell et al . ; Köhler & Huth ). However, this study found no difference in beta‐diversity between disturbed and control subplots in any site (Fig.…”

Section: Discussionmentioning

confidence: 99%

Consistent, small effects of treefall disturbances on the composition and diversity of four Amazonian forests

et al. 2016

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Summary Understanding the resilience of moist tropical forests to treefall disturbance events is important for understanding the mechanisms that underlie species coexistence and for predicting the future composition of these ecosystems. Here, we test whether variation in the functional composition of Amazonian forests determines their resilience to disturbance.We studied the legacy of natural treefall disturbance events in four forests across Amazonia that differ substantially in functional composition. We compared the composition and diversity of all free‐standing woody stems 2–10 cm diameter in previously disturbed and undisturbed 20 × 20 m subplots within 55, one‐hectare, long‐term forest inventory plots.Overall, stem number increased following disturbance, and species and functional composition shifted to favour light‐wooded, small‐seeded taxa. Alpha‐diversity increased, but beta‐diversity was unaffected by disturbance, in all four forests.Changes in response to disturbance in both functional composition and alpha‐diversity were, however, small (2 – 4% depending on the parameter) and similar among forests. Synthesis. This study demonstrates that variation in the functional composition of Amazonian forests does not lead to large differences in the response of these forests to treefall disturbances, and overall, these events have a minor role in maintaining the diversity of these ecosystems.

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Impacts of recruitment limitation and canopy disturbance on tropical tree species richness

Cited by 30 publications

References 37 publications

Assessing forest canopy closure in a geospatial medium to address management concerns for tropical islands—Southeast Asia

Assessing forest canopy closure in a geospatial medium to address management concerns for tropical islands—Southeast Asia

Differential diameter-size effects of forest management on tree species richness and community structure: implications for conservation

Consistent, small effects of treefall disturbances on the composition and diversity of four Amazonian forests

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