Habitat differentiation of sympatric Geonoma macrostachys (Arecaceae) varieties in Peruvian lowland forests

2006 ◽  
Vol 22 (4) ◽  
pp. 483-486 ◽  
Author(s):  
Julissa Roncal
Keyword(s):  
Ecological Factors ◽  
Niche Differentiation ◽  
Plant Distribution ◽  
Habitat Specialization ◽  
Factors Affecting ◽  
Plant Groups ◽  
Habitat Differentiation ◽  
Lowland Forests ◽  
High Species Richness ◽  
Parapatric Speciation

Among the hypotheses invoked to explain high species richness in tropical forests, the niche differentiation hypothesis has received observational and experimental support (Ashton 1969, Chesson 2000, Clark et al. 1999, Souza & Martins 2004, Svenning 2001, Terborgh & Mathews 1999). Habitat specialization with regard to edaphic factors and topography has been observed in several plant groups including trees, lianas, shrubs, ferns and palms (Clark et al. 1999, Ibarra-Manriquez & Martinez-Ramos 2002, Svenning 1999, Tuomisto & Ruokolainen 1993). Treefall gaps and light gradients have also been found to be important ecological factors affecting plant distribution and niche differentiation in the understory (Chazdon 1986, Poorter & Arets 2003, Terborgh & Mathews 1999). It is suggested that such habitat heterogeneity may not only maintain biodiversity but also may lead to the origin of new species through the process of parapatric speciation (Gentry 1989, Haffer 1997, Patton & Smith 1992).

Exploring the Ecological Factors Affecting the Employment of People with Disabilities

2019 ◽  
Vol 3 (3) ◽  
pp. 69-93
Author(s):  
Young-soo Kim ◽  
◽  
Su-yon Kim ◽  
Won-sup Ryu ◽  
Soo-eun Park ◽  
...  
Keyword(s):  
Ecological Factors ◽  
People With Disabilities ◽  
Factors Affecting

Ecological factors affecting gene flow in the Brachionus plicatilis complex (Rotifera)

Oecologia ◽  
1997 ◽  
Vol 111 (3) ◽  
pp. 350-356 ◽  
Author(s):  
Africa Gómez ◽  
María José Carmona ◽  
Manuel Serra
Keyword(s):  
Gene Flow ◽  
Brachionus Plicatilis ◽  
Ecological Factors ◽  
Factors Affecting

scholarly journals Protocol for a quasi-experimental study examining the effect of a ball skills intervention on four domains of preschooler development

2021 ◽  
Vol 22 ◽  
Author(s):  
Hua Wu ◽  
Wichai Eungpinichpong ◽  
Hui Ruan ◽  
Xinding Zhang ◽  
Sansan Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Motor Development ◽  
Self Regulation ◽  
Ecological Factors ◽  
Pilot Project ◽  
Background Information ◽  
Factors Affecting ◽  
Quasi Experimental ◽  
The Impact ◽  
Ball Skills

Abstract Background: Preschooler inactivity and insufficient motor development have serious long-term consequences. The Chinese Ministry of Education launched a nationwide football-focused pilot project aimed at kindergartens in 2019 and issued the policy “Notice on the Establishment of National Football Kindergartens” in 2020. However, the impact of fundamental movement skills (FMS) interventions on other aspects of child development is unclear. Aim: This study will evaluate the effects of ball skills physical education projects on the development of Chinese preschoolers’ physical, motor, cognitive, and social competencies and examine the influencing factors. Method: This is a quasi-experimental study evaluating how well the “Hello Sunshine” curriculum project promotes children’s development over 10 weeks. The trial will be conducted from September 2021 to November 2021 in 12 classes from 3 kindergartens with a total of 249 children aged 4 to 6 years in Haikou, China. Pre- and posttest analyses will include tests on participants’ physical fitness, FMS, cognitive self-regulation, and emotional competence. Participants’ background information will be collected through questionnaires answered by parents and teachers. The intervention will focus on game-based basic ball skills. Findings: If this intervention provides evidence that these skills improve children’s multidimensional development, it will support the promotion of similar programs in China. We will also outline the social-ecological factors affecting the intervention’s results, providing further information for improving pedagogical methods related to preschool ball skills.

scholarly journals Acquisition of fungi from the environment modifies ambrosia beetle mycobiome during invasion

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8103 ◽  
Author(s):  
Davide Rassati ◽  
Lorenzo Marini ◽  
Antonino Malacrinò
Keyword(s):  
Biological Invasions ◽  
Exotic Species ◽  
Ecological Factors ◽  
Ambrosia Beetle ◽  
Fungal Communities ◽  
Bottleneck Effect ◽  
Factors Affecting ◽  
Microbial Symbionts ◽  
Insect Fungi ◽  
Native Fungi

Microbial symbionts can play critical roles when their host attempts to colonize a new habitat. The lack of symbiont adaptation can in fact hinder the invasion process of their host. This scenario could change if the exotic species are able to acquire microorganisms from the invaded environment. Understanding the ecological factors that influence the take-up of new microorganisms is thus essential to clarify the mechanisms behind biological invasions. In this study, we tested whether different forest habitats influence the structure of the fungal communities associated with ambrosia beetles. We collected individuals of the most widespread exotic (Xylosandrus germanus) and native (Xyleborinus saxesenii) ambrosia beetle species in Europe in several old-growth and restored forests. We characterized the fungal communities associated with both species via metabarcoding. We showed that forest habitat shaped the community of fungi associated with both species, but the effect was stronger for the exotic X. germanus. Our results support the hypothesis that the direct contact with the mycobiome of the invaded environment might lead an exotic species to acquire native fungi. This process is likely favored by the occurrence of a bottleneck effect at the mycobiome level and/or the disruption of the mechanisms sustaining co-evolved insect-fungi symbiosis. Our study contributes to the understanding of the factors affecting insect-microbes interactions, helping to clarify the mechanisms behind biological invasions.

THE ECOLOGICAL FACTORS AND HUMAH HEALTH

2019 ◽  
Vol 49 ◽  
pp. 148-149
Author(s):  
Javakhadze R. ჯავახაძე რ. ◽  
Turmanauli M. თურმანაული მ. ◽  
Kverenchkhiladze R. კვერენჩხილაძე რ. ◽  
Chikovani A. ჩიქოვანი ა. ◽  
Arabidze M. არაბიძე მ. ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Disease Prevention ◽  
Negative Impact ◽  
Ecological Factors ◽  
Well Being ◽  
Significant Rise ◽  
Factors Affecting ◽  
The Public ◽  
Safe Environment ◽  
Global Problems

One of the actual global problems of mankind is an environmental pollution and its negative impact on a population’s health, that is the basis of existence of each human being and the entire state. The purpose of this article is to inform the public about the environmental factors affecting human health and its causes.As there is significant rise of ecological diseases, in many countries worldwide during the last years a great attention is paid to the legal side of environmental protection. Public well being is determined by ensuring its sanitaryepidemiological conditions,safe environment and disease prevention.

Ecological factors affecting body size of Japanese adolescents

1993 ◽  
Vol 91 (3) ◽  
pp. 299-303 ◽  
Author(s):  
Akira Endo ◽  
Katsuhiko Omoe ◽  
Hitoshi Ishikawa
Keyword(s):  
Body Size ◽  
Ecological Factors ◽  
Factors Affecting ◽  
Japanese Adolescents
Sign in / Sign up

Export Citation Format

Share Document