scholarly journals IMPACT OF CLIMATE CHANGE ON THE POTENTIAL DISTRIBUTION OF NATIVE AND INVASIVE GRASSES IN THE CERRADO

FLORESTA ◽  
2020 ◽  
Vol 50 (3) ◽  
pp. 1555
Author(s):  
Paula Alves Oliveira ◽  
Cristiane Coelho De Moura ◽  
Lidia Gabriella Santos ◽  
Israel Marinho Pereira ◽  
Marcelo Leandro Bueno ◽  
...  

Biological invasion, mainly by African grasses, is one of the main threats to the Cerrado's biodiversity. The objective of this study was to elucidate the distribution patterns of the exotic grass Melinis minutiflora and the native grass Trichanthecium cyanescens, in order to verify the areas of potential occurrence of these species and, thus, to infer if their potential distribution will be affected by climate changes. Species occurrence data and ten uncorrelated climatic variables referring to the forecasts for the current period and future forecasts (2050 and 2070) were used for the analysis of the modeling. The models indicated the existence of environmental suitability, with AUCs above 0.8 (good) being observed in M. minutiflora and above 0.9 (excellent) in T. cyanescens. It is concluded that climate change may have negative impacts on the geographic distribution of these species, reducing the area of environmental suitability for them. In addition, the species studied have similar areas of potential distribution and regularly overlap, which can make M. minutiflora a threat to the conservation of T. cyanences, due to the invasion potential of the first.

2020 ◽  
Vol 8 ◽  
Author(s):  
Pablo Medrano-Vizcaíno ◽  
Patricia Gutiérrez-Salazar

Nasuella olivacea is an endemic mammal from the Andes of Ecuador and Colombia. Due to its rarity, aspects about its natural history, ecology and distribution patterns are not well known, therefore, research is needed to generate knowledge about this carnivore and a first step is studying suitable habitat areas. We performed Ecological Niche Models and applied future climate change scenarios (2.6 and 8.5 RCP) to determine the potential distribution of this mammal in Colombia and Ecuador, with current and future climate change conditions; furthermore, we analysed its distribution along several land covers. We found that N. olivacea is likely to be found in areas where no records have been reported previously; likewise, climate change conditions would increase suitable distribution areas. Concerning land cover, 73.4% of N. olivacea potential distribution was located outside Protected Areas (PA), 46.1% in Forests and 40.3% in Agricultural Lands. These findings highlight the need to further research understudied species, furthering our understanding about distribution trends and responses to changing climatic conditions, as well as informig future PA designing. These are essential tools for supporting wildlife conservation plans, being applicable for rare species whose biology and ecology remain unknown.


2019 ◽  
Vol 45 (2) ◽  
pp. 215-228 ◽  
Author(s):  
André Felipe de Araujo Lira ◽  
Raúl Badillo-Montaño ◽  
Andrés Lira-Noriega ◽  
Cleide Maria Ribeiro de Albuquerque

2019 ◽  
Vol 39 (5) ◽  
Author(s):  
塞依丁·海米提 SAYIT Hamit ◽  
努尔巴依·阿布都沙力克 NURBAY Abdushalih ◽  
许仲林 XU Zhonglin ◽  
阿尔曼·解思斯 ARMAN Jiesisi ◽  
邵华 SHAO Hua ◽  
...  

Author(s):  
Fang Wang ◽  
Duo Wang ◽  
Ge Guo ◽  
Meixia Zhang ◽  
Jiayi Lang ◽  
...  

Abstract Ceroplastes cirripediformis Comstock is one of the most destructive invasive pests that have caused various negative impacts to agricultural, ornamental, and greenhouse plants. Since it is time- and labor-consuming to control C. cirripediformis, habitat evaluation of this pest may be the most cost-effective method for predicting its dispersal and avoiding its outbreaks. Here, we evaluated the effects of climatic variables on distribution patterns of C. cirripediformis and produced a global risk map for its outbreak under current and future climate scenarios using the Maximum Entropy (MaxEnt) model. Our results showed that mean temperature of driest quarter (Bio 9), precipitation of coldest quarter (Bio 19), precipitation of warmest quarter (Bio 18), and mean temperature of wettest quarter (Bio 8) were the main factors influencing the current modeled distribution of C. cirripediformis, respectively, contributing 41.9, 29.4, 18.8, and 7.9%. The models predicted that, globally, potential distribution of C. cirripediformis would be across most zoogeographical regions under both current and future climate scenarios. Moreover, in the future, both the total potential distribution region and its area of highly suitable habitat are expected to expand slightly in all representative concentration pathway scenarios. The information generated from this study will contribute to better identify the impacts of climate change upon C. cirripediformis’s potential distribution while also providing a scientific basis for forecasting insect pest spread and outbreaks. Furthermore, this study serves an early warning for the regions of potential distribution, predicted as highly suitable habitats for this pest, which could promote its prevention and control.


Author(s):  
Diana Hernandez Langford ◽  
Jaime Escoto Moreno ◽  
Joaquín Sosa Ramírez

Aim: Mexican hand tree Chiranthodendron pentadactylon is an evergreen temperate tree species restricted to cloud forests and pine-oak forests of southern Mexico, Guatemala and possibly Honduras. Climate is believed to significantly contribute to the species establishment, viability and distribution. Insights into the impact of climate change on the species potential distribution throughout time were approached by ecological niche modeling tools. Location: Southern Mexico, Guatemala and Honduras. Methods: Past (Last Interglacial 120-140 KA, Last Glacial Maximum 22 KA, Mid-Holocene 6 KA), historical (1910-2009) and future (2021-2040, 2041-2060, 2061-2080 and 2081-2100) potential distributions and corresponding environmental suitability were modelled using the Maximum Entropy algorithm. Current (historical) models were based on the most up to date historical environmental variables and constituted the baseline for past and future projections. Past predictions are revisited in a phylogeographic context. Future predictions were made for four different emissions scenarios. Results: Increase in potential distribution range comes about during cold and humid periods but higher suitability possibly relates to humid conditions. Potential distribution alongside environmental suitability diminishes during warm and dry periods. Future climate change implies warmer periods whence environmental suitability declines following a linear trend. Main conclusions: Future warmer conditions are predicted to linearly reduce environmental suitability throughout time. Biotic and anthropogenic factors further threaten the species distribution. Demographic trends and genetic diversity estimated through a recent phylogeographic study, complement the statement that populations viability is increasingly being threatened by current and future climate change, underscoring the need for the implementation of conservation actions.


Atmosphere ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1344
Author(s):  
Luigi Fusco Girard ◽  
Francesca Nocca

The shift towards the new paradigm, that is, the “ecological and humanistic” paradigm, introduced by the United Nations in the Agenda 2030, and the current period of health emergency due to COVID-19 place the human dimension at the centre of the development strategies for our cities. The humanistic dimension, in particular, is related to human wellbeing, health and living conditions. The health and wellbeing of citizens depend on factors and actions that go beyond the health sector. In particular, here, the attention is focused on the negative impacts produced by pollution and climate change, issues that concern (and that are closely related to) most urban agglomerations in the world. The pandemic due to COVID-19 has highlighted the close relationship existing among social, natural and economic systems. Each system is interdependent on the other. Thus, the pandemic has boosted the necessity to accelerate efforts to address climate change. Therefore, in this framework, new urban development models are required. The circular economy model is proposed as a model able to reduce the negative impacts of urban transformations. The attention is then focused on implementation tools for improving decision-making processes and, in particular, on the evaluation tools for assessing the multidimensional impacts of urbanisation on human health.


Author(s):  
Le Thi Nhu Quynh

Life skills education to deal with the climate change and management of natural disaster prevention for students in ethnic minorities boarding high schools are very necessary nowadays. Based on educational activities of life skills, we establish and develop the awareness, attitudes and behavior for students, help them to find the causes and consequences of climate change and the natural disaster so that they shape attitudes and behavior of themselves in adaptation and mitigation due to climate change and natural disasters, as well as conscious propaganda for everyone to perform, toward a better life, a civilized society, meet overall educational goals during the current period. So that, life skills education for the goals of meeting the needs of disaster prevention for students are concerned. However, we not only say doctrinairely but also pay attention to the results of the life skills education due to meet the needs of disaster prevention, by then we form perceptions, attitudes and behavior for students in schools and in society. So there must be coordination between the forces of education in schools with families and society. Therefore, life skills education for students acquire sustainably. Assay results consulted reviews of managers, teachers showed that life skills educational management measures meeting the needs of disaster prevention for the students are necessary and available, suitable with the practice of ethnic minorities boarding high schools.


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