Diversity and composition of plant species in the forest

David Tilman, 1,2 Forest Isbell,1,3 and Jane M. Cowles 1Department of Ecology, Evolution, plots that differed in diversity and composition because of different rates of nitrogen addition, plant species number was described by log-linear relationships, with productivity thus being an

Understanding the regulation of species diversity has been a central goal of ecology since the time Another well-known and widely accepted example is that of the indirect control of kelp forests by sea otters (64). In the absence of sea otters, high-diversity kelp forests disappear and are replaced by

Table 2. Total individuals, species and diversity values in the subfamilies of Geometridae in each site. The importance of understorey plants in various types of forest in determining the composition of The creation of forest plantations, especially those planted with indigenous tree species, may

species richness, species diversity, and species composition). Our results indicated that J. virginiana encroachment suc-cess increased with increasing plant richness and diversity. Moreover, growth and survival of J. virginiana seedlings was associated with plant species composition only in the old-field grassland and upland oak forest.

evidence has shown reductions in plant diversity during the fragmentation process and changes in forest composition (Hobbs and Yates 2003). There are several theories predicting the similarity in plant composition among forests or patches. According to neutral theories, the similarity in floristic

on the species composition in both forests types and on the species diversity in the managed forest. In particu-lar, epiphytes demanding shady conditions and a con-sistent humidity may suffer from the abrupt exposition to radiation and the lower humidity after logging. Species typical for the unmanaged forest and most rare species must be

Plants are mainly multicellular organisms, predominantly photosynthetic eukaryotes of the kingdom Plantae. Historically, plants were treated as one of two kingdoms including all living things that were

structure and composition of natural woody plant species and leading to the declining of forest diversity and agricultural yield in Ethiopia. Such activities pose a serious threat to the conservation and regeneration status of biodiversity in general and plant species in particular.

forest cycle,” and that “the gapphase is thus the most important part of the growth cycle for the determination of floristic composition.” Thegenesisof thegaphypothesisbeganwiththe studies of Watt (1925), Aubréville (1938), and Jones (1945), who described the patchy nature of mature forest communities (cited in Swaine

Trends in community composition and diversity of neotropical forests as measured by a series of samples of (1) plants 2 2.5 cm dbh in 0.1 ha, (2) plants over 10 cm dbh in 1

Here, forests survive in a grassland matrix and fire has played a key role in their spatial and temporal dynamics since the Miocene. As part of the first assessment on species composition and diversity conducted in the Ngel Nyaki Forest Dynamics Plot, we calculated abundances, basal area and

Jul 01,  · Understory plant composition and diversity levels in oak-hickory (Quercus-Carya) forests have historically been maintained by periodic low-intensity ground fires, but fire suppression has altered the structure and function of these communities.We examined burned and unburned oak-hickory stands to determine the influence of repeated burning on understory communities.

Feb 15,  · Taking a species pool-based approach to plant diversity, we have confirmed that the composition of cultivated and, to a lesser degree, spontaneous urban plants is more similar among urban areas than among comparable natural reference areas. Despite this, cultivated species are more phylogenetically distant to each other than natural area species.

Within forest stands, understory communities are the reservoir of the majority of plant species diversity and influence the composition of future forests in response to disturbance. Although changes to stand composition following beetle outbreaks are well documented, information on immediate responses of forest understory plant communities is

Apr 01,  · Forest tree diversity, and hence total diversity, may also be reduced in forests with soggy soils like those of the igapò or "swamp forest." The limited number of tree species like Cecropia and palms that can tolerate these wet soil conditions means that these few trees species

Jun 27,  · In forest ecosystems, fungal diversity and community composition have been reported to be closely linked to numerous biotic and abiotic factors, such as stand age , , elevation , , plant diversity , , plant productivity , , and soil environment , . The impact of these factors on the soil fungal community has rarely been studied in combination

Jan 24,  · A total number of 191 angiosperm species were found in the 13 forest plots, of which 72 were woody plants and 119 were herbaceous plants. Taxonomic diversity (species richness) of woody plants was strongly and negatively correlated with elevation (r = −0.918, P < 0.001).

Though often overlooked, small wetlands in an upland matrix can support diverse plant communities that increase both local and regional species richness. Here we characterize the full range of wetland vegetation within an upland forest landscape and compare the diversity and composition of

forests and contain species of both forest types. Some books refer to the northernmost broad band of mixed coniferous and deciduous trees that stretches across northern North America These forest type zones are further classified by the tree species in each zone such as oak-hickory, oak-pine, etc.

ecological characteristics in sites, species diversity and regeneration status of species (Khumbongmayum et al. 2006). Species diversity is one of the most important indices used for evaluating the stability and sustainability of forest communities. Information on the species composition of a forest is essential for its wise management in

the impacts of such changes on ecosystem processes are controversial. Plant species diversity, functional diversity, and functional composition were experimentally varied in grassland plots. Each factor by itself had significant effects on many ecosystem pro-cesses, but functional composition and functional diversity were the principal factors