scholarly journals Resolving the invasion paradox: pervasive scale and study dependence in the native‐alien species richness relationship

2019 ◽  
Vol 22 (6) ◽  
pp. 1038-1046 ◽  
Author(s):  
Federico Tomasetto ◽  
Richard P. Duncan ◽  
Philip E. Hulme
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
Invasion Paradox

Human population density explains alien species richness in protected areas

2013 ◽  
Vol 159 ◽  
pp. 137-147 ◽  
Author(s):  
Dian Spear ◽  
Llewellyn C. Foxcroft ◽  
Hugo Bezuidenhout ◽  
Melodie A. McGeoch
Keyword(s):  
Species Richness ◽  
Population Density ◽  
Protected Areas ◽  
Alien Species ◽  
Human Population ◽  
Human Population Density

scholarly journals Urbanization and Human Population Favor Species Richness of Alien Birds

Diversity ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 72
Author(s):  
Maria Lazarina ◽  
Mariana A. Tsianou ◽  
Georgios Boutsis ◽  
Aristi Andrikou-Charitidou ◽  
Elpida Karadimou ◽  
...  
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
Human Activities ◽  
Native Species ◽  
Human Population ◽  
Generalized Additive Models ◽  
Additive Models ◽  
Land Uses ◽  
Time Periods ◽  
Native Species Richness

Human activities like urbanization and agriculture affect spatial biodiversity patterns. The presence and activities of humans richly benefit alien species, but native species usually decline in human-impacted areas. Considering that the richness of alien and native species are inter-related, we explored the effect of human population density, human-related land uses (agricultural and urban), and natural land area on avian (alien and native) species richness of Massachusetts for two time periods using Generalized Additive Models. Avian alien species richness increased with native species richness in both time periods. Despite the predominant role of native species richness as a major driver of alien species richness, human activities play an important additional role in shaping species richness patterns of established aliens. Human-related land uses (urban and agricultural) and human population favored alien species richness in both time periods. Counter to expectations, human activities were also positively associated to native avian species richness. Possible explanations of these patterns may include habitat heterogeneity, increased availability of resources, and reduced predation risk.

scholarly journals Alien species richness is currently unbounded in all but the most urbanized bird communities

Ecography ◽  
2019 ◽  
Vol 42 (8) ◽  
pp. 1426-1435
Author(s):  
Toby P. N. Tsang ◽  
Ellie E. Dyer ◽  
Timothy C. Bonebrake
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
Bird Communities

Determinants of native and alien species richness in the urban flora of Rome

2006 ◽  
Vol 12 (5) ◽  
pp. 490-501 ◽  
Author(s):  
Laura Celesti-Grapow ◽  
Petr Pyšek ◽  
Vojtěch Jarošik ◽  
Carlo Blasi
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
Urban Flora

Species richness, alien species and plant traits in Central Argentine mountain grasslands

2003 ◽  
Vol 14 (1) ◽  
pp. 129-136 ◽  
Author(s):  
J.J. Cantero ◽  
J. Liira ◽  
J.M. Cisneros ◽  
J. Gonzalez ◽  
C. Nuñez ◽  
...  
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
Plant Traits ◽  
Mountain Grasslands

scholarly journals IMPACT OF INVASIVE ALIEN SPECIES ON BIODIVERSITY AND POPULATION STRUCTURE IN MORNI HILLS OF WESTERN HIMALAYA

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Anup Chandra ◽  
Ashok Kumar Dhakad
Keyword(s):  
Population Structure ◽  
Species Richness ◽  
Alien Species ◽  
Invasive Alien Species ◽  
Western Himalaya ◽  
Lantana Camara ◽  
Mountain Range ◽  
Forest Communities ◽  
Study Sites ◽  
The Impact

Species diversity, especially in forests, is one of the most important indices used to evaluate forest productivity, sustainability of forest communities and its ecological functioning and stand structure. Invasive alien species (IAS) are usually considered to be the second greatest threat to biodiversity after habitat destruction. The present study aims to characterize estimate the species richness, dominance of certain species distribution and population structure of major species in the study areas i.e. Kalka, Morni and Pinjore forest range of Panchkula Forest Division, Haryana lies under the Shiwalik mountain range of Western Himalaya. To achieve this, phytosociological study was carried out using quadrat method to assess the impact of IAS on plant diversity. We took twenty quardrats laid down in each site (10×10m for tree layer; 3×3m for shrubby layer and 1×1m for herbaceous flora) in both, invaded sites and control sites (without any IAS). In the study sites, Lantana camara was the major threat to the native flora. In general, diversity index (H) was higher at control site, however, species richness was found to be more in Lantana infested sites for trees and more or less equal for herbs and shrubs in control sites. This indicates the invasion of L. camara after the establishment of tree species in study sites. In all sites, the seedlings have significant more number than saplings and trees. But the conversion of saplings into trees was poor as well as the production of seedlings and their survival rate was very less or drastically reduced. Thus, there is an urgent need of conservation and management of alien invasive species in Himalayas and other parts of Indian forests. Lantana camara infestation can be managed if we utilize it for making handmade papers, handicrafts, baskets, toys, etc. by involving the self help groups and village forest communities.

scholarly journals Registros nuevos y sobresalientes de aves para el estado de Hidalgo, México

2011 ◽  
Vol 27 (3) ◽  
Author(s):  
Jorge Valencia-Herverth ◽  
Raúl Valencia-Herverth ◽  
Ma. Eugenia Mendiola-González ◽  
Maximino Sánchez-Cabrera ◽  
Miguel Angel Martínez-Morales
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
Bird Species ◽  
The State

We provide evidence of the presence of 18 additional bird species to the avifauna of the state of Hidalgo (including an alien species). We also provide information of 14 outstanding or recent records of species previously recorded in the state. To date, the confirmed presence of 496 native bird species constitutes the species richness of Hidalgo, in addition to 6 introduced alien species.

scholarly journals Endemics and Cosmopolitans: Application of Statistical Mechanics to the Dry Forests of Mexico

Entropy ◽  
2019 ◽  
Vol 21 (6) ◽  
pp. 616
Author(s):  
Michael G. Bowler ◽  
Colleen K. Kelly
Keyword(s):  
Species Richness ◽  
Statistical Mechanics ◽  
Alien Species ◽  
Tropical Forests ◽  
Dry Forest ◽  
Single Site ◽  
Seasonally Dry ◽  
Forest Sites ◽  
Seasonally Dry Tropical Forests ◽  
Dry Tropical Forests

Data on the seasonally dry tropical forests of Mexico have been examined in the light of statistical mechanics. The results suggest a division into two classes of species. There are drifting populations of a cosmopolitan class capable of existing in most dry forest sites; these have a statistical distribution previously only observed (globally) for populations of alien species. We infer that a high proportion of species found only at a single site are specialists, endemics, and that these prefer sites comparatively low in species richness.

Leaf thickness and elevation explain naturalized alien species richness in a tropical mountain forest: A case study from Mount Gede-Pangrango National Park, Indonesia

2021 ◽  
Vol 18 (7) ◽  
pp. 1837-1846
Author(s):  
Decky Indrawan Junaedi ◽  
Imawan Wahyu Hidayat ◽  
Muhammad Efendi ◽  
Zaenal Mutaqien ◽  
Musyarofah Zuhri ◽  
...  
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
National Park ◽  
Leaf Thickness ◽  
Mountain Forest ◽  
Tropical Mountain

Effects of size, shape, and edge on vegetation in remnants of the upland boreal mixed-wood forest in agro-environments of Alberta, Canada

2007 ◽  
Vol 85 (3) ◽  
pp. 273-284 ◽  
Author(s):  
L. Dennis Gignac ◽  
Mark R.T. Dale
Keyword(s):  
Species Richness ◽  
Alien Species ◽  
Plant Species ◽  
Fragment Size ◽  
Vascular Plant ◽  
Plant Species Richness ◽  
Percent Cover ◽  
Shrub Species ◽  
Alien Plant ◽  
Species Richness And Abundance

Forty-one remnants of the aspen-dominated upland forest in three subregions of the dry boreal mixed-wood in Alberta were studied to determine effects of fragment size and shape on native and alien plant species richness and abundance in agro-environments. The percent cover of all vascular plant species was visually estimated in 5 m diameter circular plots along transects that covered the length and the width of each fragment. A subset of 12 of the largest fragments (>900 m2) that had distinct interiors (portions of the fragment >15 m from any edge) was used to measure edge effects on the vegetation. Regression analyses revealed significant positive relationships between species richness and area regardless of the subregion. Species richness stabilized in fragments that were larger than 11 ha. Edges did not affect shrub species richness and only affected herbaceous species richness on west- and south-facing aspects. Shrub abundance decreased and herb abundance increased up to 20 m from the edges regardless of orientation. Edges did not support a different suite of species than interiors, although several species occurred more frequently in the interior than along the edges. Alien species richness and abundance reached their highest values between 5 and 15 m from the edge, and some of those species could be found up to 40 m from the edge. Although larger fragments generally supported more alien species than smaller fragments, the smallest fragments had the greatest number of species per metre squared. Results from this study indicated that it would be preferable to conserve larger woodlots rather then several smaller woodlots on the landscape.

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