Rubber (Hevea brasiliensis) latex production is crucial to the local economy, yet Xishuangbanna’s climate is considered sub-optimal for rubber cultivation. The prevalence of the powdery mildew disease (Oidium heveae) in this region has decreased the annual latex yield by 20%. Rubber latex yield is influenced by several factors, including temperature, disease, other biotic conditions, and plantation management. However, the interrelationships and potential influencing networks between rubber latex yield and these factors are rarely quantitatively assessed, and understanding their impacts on latex yield could inform better management practices. To address this gap, we investigated the effects of temperature, phenology, and powdery mildew disease on rubber latex yield in March using observational data on daily rubber latex yield combined with detailed phenology, powdery mildew, and temperature data from 2004 to 2010 in a state farm in the Xishuangbanna, Yunnan, China. We found that the critical influencing periods of daily temperature difference (or diurnal temperature difference) on the rubber latex yield were during Nov 27–Jan 19 and Jan 21–Mar 17. Partial least square regression analysis and variance partitioning analysis were conducted on the 35 phenological variables, eight powdery mildew-related variables, and two climatic variables. The most influential factors were identified as the factors of the daily temperature differences during Jan–Mar, the duration of leaf flushing phenology, and mean and maximum percentage of leaves infected by powdery mildew. Subsequent canonical correlation analysis and linear regression found that temperature difference directly affected the rubber latex yield and indirectly affected the yield through phenology and powdery mildew disease. Raised daily temperature differences from Jan to Mar had the greatest impact, leading to a higher rubber latex yield. Our comprehensive quantitative assessment revealed the relative importance of antecedent daily temperature differences, phenology, and powdery mildew disease as well as their complex interconnections in influencing rubber latex yield. Our findings are essential to future studies on both powdery mildew disease and rubber latex yield, and also develop rubber latex models.
Tag: Climate
Zambia for agroforestry, biodiversity, and climate (Z4ABC): Enhancing the sustainability, resilience, and productivity of agricultural, forestry, and wildlife-based value chains in Zambia
The project aims to support the development of climate-smart, productive, and sustainable transformation of agriculture, forestry, and food systems in Zambia, in order to help achieve the country’s nationally determined contributions (NDCs) to reduce emissions and adapt to climate impacts.
Expanding Opportunities: A Framework for Gender and Socially-Inclusive Climate Resilient Agriculture
Limiting global warming to the 2°C target that countries have committed to in the 2015 Paris Agreement, and reaching the Sustainable Development Goals by 2030, will require large-scale expansion of climate-resilient approaches in agriculture and food systems. In order to achieve the scale of change required, coordinated action is needed from global to local levels, from research to policy and investment, and across private, public, and civil society sectors. But at the same time, differential approaches are needed to address gender equality and women’s concerns in climate-resilient agriculture. This article sets out a conceptual framework for scaling up climate resilient agriculture (CRA) approaches that are gender and socially inclusive by taking into account these constraints and inequalities across wider areas and different aspects of CRA. It builds on gender and climate-resilient agriculture research and project experience to argue that the additional integration of women’s empowerment approaches and dimensions into this scaling framework provides the opportunity to promote gender equality while scaling up. It also identifies gaps and areas for further analysis and research. The intention is to identify potential pathways for developing a gender- and socially-inclusive set of options and strategies, in four key dimensions: climate resilient technologies and practices; climate information services that reach under-reached groups; inclusive finance mechanisms; and promoting leadership in decision-making. Copyright © 2021 Huyer, Simelton, Chanana, Mulema and Marty.
Land Cover and Land Use Change Decreases Net Ecosystem Production in Tropical Peatlands of West Kalimantan, Indonesia
Deforested and converted tropical peat swamp forests are susceptible to fires and are a major source of greenhouse gas (GHG) emissions. However, information on the influence of land-use change (LUC) on the carbon dynamics in these disturbed peat forests is limited. This study aimed to quantify soil respiration (heterotrophic and autotrophic), net primary production (NPP), and net ecosystem production (NEP) in peat swamp forests, partially logged forests, early seral grasslands (deforested peat), and smallholder-oil palm estates (converted peat). Peat swamp forests (PSF) showed similar soil respiration with logged forests (LPSF) and oil palm (OP) estates (37.7 Mg CO2 ha−1 yr−1, 40.7 Mg CO2 ha−1 yr−1, and 38.7 Mg CO2 ha−1 yr−1, respectively), but higher than early seral (ES) grassland sites (30.7 Mg CO2 ha−1 yr−1). NPP of intact peat forests (13.2 Mg C ha−1 yr−1) was significantly greater than LPSF (11.1 Mg C ha−1 yr−1), ES (10.8 Mg C ha−1 yr−1), and OP (3.7 Mg C ha−1 yr−1). Peat swamp forests and seral grasslands were net carbon sinks (10.8 Mg CO2 ha−1 yr−1 and 9.1 CO2 ha−1 yr−1, respectively). In contrast, logged forests and oil palm estates were net carbon sources; they had negative mean Net Ecosystem Production (NEP) values (−0.1 Mg CO2 ha−1 yr−1 and −25.1 Mg CO2 ha−1 yr−1, respectively). The shift from carbon sinks to sources associated with land-use change was principally due to a decreased Net Primary Production (NPP) rather than increased soil respiration. Conservation of the remaining peat swamp forests and rehabilitation of deforested peatlands are crucial in GHG emission reduction programs
Translating climate-smart agriculture policies into action: A guidebook for operationalizing climate-smart agriculture into local action planning
Various countries have made significant progress in translating climate ambition into national action through legislation and policies addressing adaptation and mitigation. There is, however, a gap in the translation of national policies into local actions. Bridging this divide requires developing the capacity of technical officers and policymakers at multiple scales, including at the subnational and local community levels, to facilitate effective policy implementation. We organized sensitization and capacity-building workshops for subnational agricultural officers in Kenya against this backdrop. This guidebook details lessons and activities that will result in completed templates for CSA action plans or project concepts.
Expanding Opportunities: Scaling Up Gender and Social Inclusion in Climate-Resilient Agriculture – An Equality and Empowerment Approach
Limiting global warming to the 2°C target in the 2015 Paris Agreement, and reaching the Sustainable Development Goals by 2030, will require large-scale expansion of climate-resilient approaches in food systems. Coordinated action is needed from global to local levels, with research, policy and investment, across private, public and civil society sectors. At the same time, these approaches need to address gender equality and social inclusion. More attention needs to be given to the factors that constrain change and innovation in the poorest and most vulnerable groups. Participatory approaches that embed equality, more equal power relations and social justice into the design and practice of climate-resilient agriculture are critical.
Effect of climatic factors on the phenological phases of Mauritia flexuosa Lf. In low terrace plantations in Ucayali, Peru [Efecto de los factores climáticos en las fases fenológicas de Mauritia flexuosa Lf. en plantaciones de terraza baja en Ucayali, Perú]
The aim of this study was to determine the influence of air temperature and rainfall on the phenological development of Mauritia flexuosa in plantations located in Ucayali, Peru. For this, during a 24-month period, 191 19-year-old palm trees were evaluated, distributed in three plantations established on low terrace soils. The results showed that the 45% of palm trees did not manifest their sexual maturity, meanwhile, 42% and 13% of individuals with male and female sex, respectively, were verified. It was found that the phenological cycle was biannual, with overlapping phenophases and staggered events. In female individuals, maximum flowering was observed in phenophase FLA1 (4-5%) from September to November 2018 and maximum fruiting FRM1 (4-6%) from October 2018 to January 2019; In male individuals, the FLA2 flowering phenophase occurs in two periods between September 2018 and February 2020, meanwhile, the open flower phenophase of both sexes is synchronous in a higher proportion between September and November. It was determined that pluvial precipitation and air temperature (maximum and minimum) did not show correlation (p = 0.05) with the productive phenophases of Mauritia flexuosa. The pluvial precipitation, the maximum temperature and the minimum air temperature showed null association with each one of the phenological phases of the Mauritia flexuosa palm trees during the evaluation period. In order to obtain information for the planning of silvicultural management activities for the conservation of the species, it is recommended to evaluate for more years the influence of climatic elements on the productive development of Mauritia flexuosa. © 2021 Universidad Nacional de Trujillo. All rights reserved.
Agroforestry environment, potentiality and risk in India: a remote sensing and GIS understanding
The study utilized the tree covers per cent, agroforestry suitability, present and future (2050) climate, agriculture vulnerability (2050), percentage of people living Below Poverty Line (BPL) data sets and manoeuvered them in GIS platform to understand the agroforestry extent, potentiality and the critical multidimensional relationship among them. The total agroforestry area in India (if defined the tree cover per cent greater than 10% on agricultural land) was found to be 28 million hectares that is approximately 17% of the total agriculture land area which is remarkably less (global average 43%). The analysis further revealed that the agriculture land potential in India towards the agroforestry suitability category (S1: High suitability) is alone 75.6 million hectares that are 2.7 times of total existing agroforestry extent. Among all agro-ecological regions of India, the Eastern Plain agro-ecological region has high cropland potentiality which will help significantly in magnifying agroforestry set-up in the future. The analysis further revealed a very high poverty per cent (41–80%) category has approximately 5.3 million hectares of land under agroforestry, whereas the cropland potentiality (category S1) towards agroforestry was found approximately four times of the present agroforestry extent. The Western Ghats and the Coastal Plain agro-ecological region maintain a diversified agroforestry environment that will face double risk in the future (2050) due to precipitation deficit and also from significant temperature increase. Our analysis highlights the important agroforestry-related findings that will assist crucially to the decision-makers of India for implementing synergic strategies/planning of agroforestry at country/state/district/village levels.
Leveraging climate finance for gender equality and poverty reduction: A comparative study
Climate finance, gender and poverty are not stand-alone, independent topics. Climate change affects all people in different ways. Climate finance can catalyze actions that can either alleviate or exacerbate gender equity and poverty. Mechanisms that fund climate action should be designed to enable, rather than hinder marginalized populations, notably women and the poor, in facing climate change.
The study aims to understand climate finance for advancing gender equality and poverty reduction, by assessing different mechanisms: 1) the Village Fund (Dana Desa); 2) the Public Service Agency for Forest Development Financing Center (BLUP3H); 3) the Indonesia Climate Change Trust Fund (ICCTF); 4) the
Special Allocation Fund (DAK); and 5) the Environmental Fund Management Agency (BPD-LH).
The study focuses on adaptation and mitigation climate action at sub- national, which include budget items tagged in the Indonesian Climate Budget Tagging system (CBT). We assess whether climate financial flows and climate actions contribute to long-term gender transformative change and pro-poor co-benefits on the ground. The sites include the agroforestry program of BPDASHL Serayu Opak Progo in Central Java and the artesian well program in Lombok.
Climate change-related adaptation and mitigation strategies have gender-differentiated impacts. In practice, implementation of pro-poor and gender-responsive climate finance is lagging behind. If the root causes of vulnerability are not taken into account, potential solutions could exacerbate the existing inequities while leaving the challenges of climate
change unaddressed. There is growing evidence that equitable and gender responsive climate finance can enhance climate response efforts, while simultaneously promoting poverty reduction and gender equality.
Forest-linked livelihoods in a globalized world
Forests have re-taken centre stage in global conversations about sustainability, climate and biodiversity. Here, we use a horizon scanning approach to identify five large-scale trends that are likely to have substantial medium- and long-term effects on forests and forest livelihoods: forest megadisturbances; changing rural demographics; the rise of the middle-class in low- and middle-income countries; increased availability, access and use of digital technologies; and large-scale infrastructure development. These trends represent human and environmental processes that are exceptionally large in geographical extent and magnitude, and difficult to reverse. They are creating new agricultural and urban frontiers, changing existing rural landscapes and practices, opening spaces for novel conservation priorities and facilitating an unprecedented development of monitoring and evaluation platforms that can be used by local communities, civil society organizations, governments and international donors. Understanding these larger-scale dynamics is key to support not only the critical role of forests in meeting livelihood aspirations locally, but also a range of other sustainability challenges more globally. We argue that a better understanding of these trends and the identification of levers for change requires that the research community not only continue to build on case studies that have dominated research efforts so far, but place a greater emphasis on causality and causal mechanisms, and generate a deeper understanding of how local, national and international geographical scales interact.