scholarly journals Meta-analysis reveals severe pollen limitation for the flowering plants growing in East Himalaya-Hengduan Mountains region

BMC Ecology ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Xianfeng Jiang ◽  
Yanping Xie
Keyword(s):  
Confidence Interval ◽  
Pollen Limitation ◽  
Meta Analysis ◽  
Flowering Plants ◽  
Biodiversity Hotspot ◽  
Clear Relationship ◽  
Hengduan Mountains ◽  
Independent Data ◽  
The World ◽  
Global Biodiversity

Abstract Background Pollen limitation occurs widely and has an important effect on flowering plants. The East Himalaya-Hengduan Mountains region is a global biodiversity hotspot. However, to our knowledge, no study has synthetically assessed the degree of pollen limitation in this area. The present study aims to reveal the degree of pollen limitation for the flowering plants growing on East Himalaya-Hengduan Mountains and to test whether the reproductive features or the elevation is closely correlated with the degree of pollen limitation in this area. Results We complied data from 76 studies, which included 96 species and 108 independent data records. We found that the flowering plants in this area undergo severe pollen limitation [overall Hedges’ d = 2.004, with a 95% confidence interval (1.3264, 2.6743)] that is much higher than that of the flowering plants growing in many other regions around the world. The degree of pollen limitation was tested to determine the correlation with the capacity for autonomous self-reproduction and with the pollination pattern (generalized vs. specialized pollination) of plants. In addition, we found a clear relationship between elevation and the degree of pollen limitation, which indicates that plants might undergo more severe pollen limitation in relatively high places. Conclusions This paper is the first to address the severe pollen limitation of the flowering plants growing in East Himalaya-Hengduan Mountains region. Moreover, we reveal the positive correlation between elevation and the degree of pollen limitation.

scholarly journals Meta-analysis reveals severe pollen limitation for the flowering plants growing in the East Himalaya-Hengduan Mountains region.

2020 ◽  
Author(s):  
xianfeng jiang ◽  
Yanping Xie
Keyword(s):  
Confidence Interval ◽  
Pollen Limitation ◽  
Meta Analysis ◽  
Flowering Plants ◽  
Biodiversity Hotspot ◽  
Clear Relationship ◽  
Hengduan Mountains ◽  
Independent Data ◽  
The World ◽  
Global Biodiversity

Abstract Background: Pollen limitation occurs widely and has an important effect on flowering plants. The East Himalaya-Hengduan Mountains region is a global biodiversity hotspot. However, to our knowledge, no study has synthetically assessed the degree of pollen limitation in this area. The present study aims to reveal the degree of pollen limitation for the flowering plants growing on the East Himalaya-Hengduan Mountains and to test whether the reproductive features or the elevation is closely correlated with the degree of pollen limitation in this area.Results: We complied data from 76 studies, which included 96 species and 108 independent data records. We found that the flowering plants in this area undergo severe pollen limitation (overall Hedges’ d=2.004, with a 95% confidence interval [1.3264, 2.6743]) that is much higher than that of the flowering plants growing in many other regions around the world. The degree of pollen limitation was tested to determine the correlation with the capacity for autonomous self-reproduction and with the pollination pattern (generalized vs. specialized pollination) of plants. In addition, we found a clear relationship between elevation and the degree of pollen limitation, which indicates that plants might undergo more severe pollen limitation in relatively high places.Conclusions: This paper is the first to address the severe pollen limitation of the flowering plants growing in the East Himalaya-Hengduan Mountains region. Moreover, we reveal the positive correlation between elevation and the degree of pollen limitation.

scholarly journals Meta-analysis reveals severe pollen limitation for the flowering plants growing in the East Himalaya-Hengduan Mountains region.

2020 ◽  
Author(s):  
Xianfeng Jiang ◽  
Yanping Xie
Keyword(s):  
Confidence Interval ◽  
Pollen Limitation ◽  
Meta Analysis ◽  
Flowering Plants ◽  
Biodiversity Hotspot ◽  
Clear Relationship ◽  
Hengduan Mountains ◽  
Independent Data ◽  
The World ◽  
Global Biodiversity

Abstract Background: Pollen limitation occurs widely and has an important effect on flowering plants. The East Himalaya-Hengduan Mountains region is a global biodiversity hotspot. However, to our knowledge, no study has synthetically assessed the degree of pollen limitation in this area. The present study aims to reveal the degree of pollen limitation for the flowering plants growing on East Himalaya-Hengduan Mountains and to test whether the reproductive features or the elevation is closely correlated with the degree of pollen limitation in this area. Results: We complied data from 76 studies, which included 96 species and 108 independent data records. We found that the flowering plants in this area undergo severe pollen limitation (overall Hedges’ d=2.004, with a 95% confidence interval [1.3264, 2.6743]) that is much higher than that of the flowering plants growing in many other regions around the world. The degree of pollen limitation was tested to determine the correlation with the capacity for autonomous self-reproduction and with the pollination pattern (generalized vs. specialized pollination) of plants. In addition, we found a clear relationship between elevation and the degree of pollen limitation, which indicates that plants might undergo more severe pollen limitation in relatively high places.Conclusions: This paper is the first to address the severe pollen limitation of the flowering plants growing in East Himalaya-Hengduan Mountains region. Moreover, we reveal the positive correlation between elevation and the degree of pollen limitation.

scholarly journals Meta-analysis reveals severe pollination limitation for the flowering plants growing in East Himalaya-Hengduan Mountains region.

2019 ◽  
Author(s):  
Xianfeng Jiang ◽  
Yanping Xie
Keyword(s):  
Hot Spots ◽  
Meta Analysis ◽  
Flowering Plants ◽  
Floral Traits ◽  
Clear Relationship ◽  
Hengduan Mountains ◽  
Independent Data ◽  
Pollination Limitation ◽  
Confident Interval ◽  
The World

Abstract Pollination limitation widely occurs and has an important effect on flowering plants. East Himalaya-Hengduan Mountains region is one of the 24 biodiversity hot spots around the world. However, no study as we known has synthetically assessed the degree of pollination limitation in this area. The present study aims to reveal the degree of pollination limitation for the flowering plants growing on East Himalaya-Hengduan mountains, and test if the reproductive features, the floral traits or the elevation are closely correlated with the degree of pollination limitation. We complied data from 76 studies, with 96 species and 108 independent data records included. We found that flowering plants in this area undergo severe pollination limitation (overall hedges’d=2.004, with the 95% confident interval [1.3264, 2.6743]), which is much higher than the flowering plants growing in many other regions around the world. The degree of pollination limitation was tested to be related to the capacity of autonomous self-reproduction and the pollination pattern (generalized vs. specialized pollinated) of plants. In addition, we found a clear relationship between elevation and the degree of pollination limitation, which indicates that plants might undergo severe pollination limitation in higher places.

Lectotypification of fifteen names of Rubus L. (Rosaceae) mainly from the Hengduan Mountains, China

Phytotaxa ◽  
2019 ◽  
Vol 391 (2) ◽  
pp. 150
Author(s):  
XIANHUA XIONG ◽  
MENG LI ◽  
TONGJUN LIANG ◽  
WENBING JU ◽  
BO XU ◽  
...  
Keyword(s):  
Taxonomic Revision ◽  
Biodiversity Hotspot ◽  
Hengduan Mountains ◽  
The World ◽  
Global Biodiversity

Rubus Linnaeus (1753: 492), one of the most taxonomically challenging genera in Rosaceae (Lu 1983, Alice & Campbell 1999, Alice et al. 2008), comprises more than 700 species (Lu & Boufford 2003) and is distributed across the world except Antarctica (Alice & Campbell 1999). The Hengduan Mountains, the mountains at the eastern end of the Himalayas, are widely regarded as a global biodiversity hotspot. During a taxonomic revision of Rubus L. in the Hengduan Mountains and its neighbouring regions, we found that fifteen names have never been typified. Lectotypification of these names are designated here after examination of previous works (Zandee & Kalkman 1981, Kalkman 1984 & 1987, Monasterio-Huelin & Castroviejol 1993, Monasterio-Huelin 1996, Monasterio-Huelin & Webert 1996, Bean 1997a & b, Allen 1998, Widrlechner 1998, Matzke-Hajek 2001a & b, Sennikov & Weber 2010, Deng 2015, Weber 2015a & b, Gupta et al. 2016, Yang et al. 2016, Beek et al. 2017, Dash & Gupta 2017, Király 2017, Király et al. 2017).

scholarly journals Prevalence of malaria relapse: systematic review with meta-analysis

2019 ◽  
Vol 27 ◽  
Author(s):  
Talita Lima do Nascimento ◽  
Suleima Pedroza Vasconcelos ◽  
Yara Peres ◽  
Mirla Jéssica Sampaio de Oliveira ◽  
Monica Taminato ◽  
...  
Keyword(s):  
Systematic Review ◽  
Confidence Interval ◽  
Meta Analysis ◽  
Eligibility Criteria ◽  
Cross Sectional ◽  
Production Of Knowledge ◽  
The World ◽  
Statistical Program ◽  
Cross Sectional Studies ◽  
Made In

ABSTRACT Objective: systematic review with a meta-analysis of the prevalence of malaria relapse. Method: it consisted in a search for cross-sectional studies, carried out in three databases, without application of filters. A total of 1,924 articles were identified, selected based on eligibility criteria. The selection was made in pairs from the reading of the titles, abstracts and text. The meta-analysis was performed with a statistical program. Results: a sample of 1,308 patients with malaria, ranging from 70 to 586 patients in the study. Relapse was estimated at 0.47%, with a 95% confidence interval and 99.04% of squared i. In the included studies, the prevalence of relapse ranged from 17.00% to 92.85%. The result of the meta-analysis is considered relevant, despite the heterogeneity. Conclusion: relapse is a phenomenon that can contribute to the maintenance of the endemicity of malaria in the world and to introduce it in non-affected areas. In addition, there is the need for advancement in the production of knowledge regarding this disease, to qualify the research methods on prevalence.

scholarly journals Global prevalence of osteoporosis among the world older adults: a comprehensive systematic review and meta-analysis

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Nader Salari ◽  
Niloofar Darvishi ◽  
Yalda Bartina ◽  
Mojdeh Larti ◽  
Aliakbar Kiaei ◽  
...  
Keyword(s):  
Systematic Review ◽  
Confidence Interval ◽  
Bone Fractures ◽  
Meta Analysis ◽  
Qualitative Evaluation ◽  
Total Sample ◽  
Policy Makers ◽  
Increased Risk ◽  
The World ◽  
Prevalence Of Osteoporosis

Abstract Background Osteoporosis is one of the most common bone system diseases that is associated with an increased risk of bone fractures and causes many complications for patients. With age, the prevalence of this disease increases so that it has become a serious problem among the elders. In this study, the prevalence of osteoporosis among elders around the world is examined to gain an understanding of its prevalence pattern. Methods In this systematic review and meta-analysis, articles that have focused on prevalence of osteoporosis in the world’s elders were searched with these key words, such as Prevalence, Osteoporosis, Elders, Older adult in the Science Direct, Embase, Scopus, PubMed, Web of Science (WoS) databases and Google Scholar search engine, and extracted without time limit until March 2020 and transferred to information management software (EndNote). Then, duplicate studies were eliminated and the remaining studies were evaluated in terms of screening, competence and qualitative evaluation based on inclusion and exclusion criteria. Data analysis was performed with Comprehensive Meta-Analysis software (Version 2) and Begg and Mazumdar test was used to check the publication bias and I2 test was used to check the heterogeneity. Results In a review of 40 studies (31 studies related to Asia, 5 studies related to Europe and 4 studies related to America) with a total sample size of 79,127 people, the prevalence of osteoporosis in the elders of the world; 21.7% (95% confidence interval: 18.8–25%) and the overall prevalence of osteoporosis in older men and women in the world, 35.3% (95% confidence interval: 27.9–43.4%), 12.5% (95% confidence interval: 9.3–16.7%) was reported. Also, the highest prevalence of osteoporosis in the elders was reported in Asia with; 24.3% (95% confidence interval: 20.9–28.1%). Conclusion The results of the present study showed that the prevalence of osteoporosis in the elders and especially elders' women is very high. Osteoporosis was once thought to be an inseparable part of elders’ lives. Nowadays, Osteoporosis can be prevented due to significant scientific advances in its causes, diagnosis, and treatment. Regarding the growing number of elderly people in the world, it is necessary for health policy-makers to think of measures to prevent and treat osteoporosis among the elders.

scholarly journals Mapping Biodiversity Patterns across Southeast Asia

2019 ◽  
Vol 3 ◽  
Author(s):  
Alice Hughes
Keyword(s):  
Southeast Asia ◽  
Species Distributions ◽  
Biodiversity Hotspot ◽  
Spatial Mapping ◽  
International Union ◽  
The World ◽  
Poor Understanding ◽  
Global Biodiversity ◽  
Initial Results ◽  
Administrative Boundary

Southeast Asia represents a global biodiversity hotspot, and yet compared to much of the rest of the world we have a relatively poor understanding of the patterns of biodiversity and endemism, or even basic distributions for many taxa. Global maps such as the IUCN (International Union for the Conservation of Nature) species range maps often have major inaccuracies in the spatial mapping of species localities, which are particularly problematic around political administrative boundary regions, and make any form of spatial prioritization difficult or impossible. Here I show various approaches to mapping biodiversity across the landscape, including the mapping of both ecosystems with high levels of endemism, and databasing huge volumes of data as a basis for mapping out species distributions when combined with other forms of data, to map out diversity at numerous different taxonomic levels. I showcase the initial results of mapping for various taxa, and different ways of aggregating the data to better understand different facets of biodiversity. Additionally I discuss various approaches to developing spatial priorities for conservation across the region and the relative tradeoffs between each.

scholarly journals Convalescent plasma therapy for COVID-19 patients: a protocol of a prospective meta-analysis of randomized controlled trials

Trials ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Lajos Szakó ◽  
Nelli Farkas ◽  
Szabolcs Kiss ◽  
Szilárd Váncsa ◽  
Noémi Zádori ◽  
...  
Keyword(s):  
Confidence Interval ◽  
Randomized Controlled Trials ◽  
Organ Failure ◽  
Weighted Mean Difference ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Cochrane Central Register ◽  
Plasma Therapy ◽  
Monthly Basis ◽  
Randomized Controlled

Abstract Background Coronavirus disease 2019 (COVID-19) is an infection with possible serious consequences. The plasma of recovered patients might serve as treatment, which we aim to assess in the form of a prospective meta-analysis focusing on mortality, multi-organ failure, duration of intensive care unit stay, and adverse events. Methods A systematic search was conducted to find relevant registered randomized controlled trials in five trial registries. A comprehensive search will be done continuously on a monthly basis in MEDLINE (via PubMed), Embase, Cochrane Central Register of Controlled Trials (CENTRAL), and Web of Science to find the results of previously registered randomized controlled trials. The selection will be done by two independent authors. Data extraction will be carried out by two other independent reviewers. Disagreements will be resolved by a third investigator. An update of the search of the registries and the first search of the databases will be done on the 21st of July. Data synthesis will be performed following the recommendations of the Cochrane Collaboration. In the case of dichotomous outcomes (mortality and organ failure), we will calculate pooled risk ratios with a 95% confidence interval (CI) from two-by-two tables (treatment Y/N, outcome Y/N). Data from models with multivariate adjustment (hazard ratios, odds ratio, risk ratio) will be preferred for the analysis. P less than 0.05 will be considered statistically significant. In the case of ICU stay, weighted mean difference with a 95% confidence interval will be calculated. Heterogeneity will be tested with I2, and χ2 tests. Meta-analysis will be performed if at least 3 studies report on the same outcome and population. Discussion Convalescent plasma therapy is a considerable alternative in COVID-19, which we aim to investigate in a prospective meta-analysis.

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