Perceived Economic Value of Ecosystem Services in the US Rio Grande Basin

In recent decades, the US Rio Grande Basin has experienced serious ecosystem degradation as a result of recurring severe droughts and a growing population. Monetary valuation of ecosystem services is essential for encouraging conservation where natural resources such as freshwater are limited. Research in this field is still very limited, and economic estimations of ecosystem services in the US Rio Grande Basin have not been undertaken extensively. This study adds to the existing contemporary literature by means of the willingness-to-pay evaluation. We found the mean household wiliness to pay of total ecosystem services across the Rio Grande Basin to amount to USD 62/year, and the average perceived economic value was estimated to be USD 26.2, USD 19.7, USD 8.1, and USD 7.1 yearly for conservation of habitat for wildlife, provision of freshwater supplies, recreational activities, and cultural heritage, respectively. The income and perceptions about the importance of various ecosystem services in the Rio Grande Basin were among the main determinants of respondents’ assessments. The findings provide an appropriate foundation for incorporating perceived economic value into watershed management and conservation.

Socio-Environmental Vulnerability of Water in the Estuary of the Metropolitan Region of Santos (Brazil)

Santos and São Vicente Estuarine Complex (SSEC) is a densely populated coastal area that houses the main port in Latin America and the most prominent Brazilian industrial complex. Irregular occupations in preservation areas result in a disorderly increase in population, with negative social and environmental impacts. We evaluated the average annual growth of 74 slums occurring in this area and variations in water quality from 2005 to 2018. We monitor the growth of the occupied areas and estimate their respective populations. The average annual population growth was over 6% per year (p.a.). Invasions of new areas and verticalisation of already occupied areas represent 85% of the growth seen. The monthly polluting loads exceeded 450 tonnes or 2,086,000 m3, compromising the waters and local and regional public health. We strongly recommend re-urbanising the area using the resource savings caused by water loss to reduce the risks of ecosystem degradation, damage to health and disease spread.

Ecosystem Degradation and Its Implications on Regulating Service

The purpose of the study was to determine the link between ecosystem degradation and regulating services. It was observed that as the ecosystem cover area decreased, the regulating services offered by the ecosystem also dwindled. The literature of the study covered the ecosystems and causes of degradation and different regulating services. The study was guided by three objectives and they included; to describe the carbon stock trends in Volcanoes National Park; to ascertain the temperature and rainfall patterns in VNP and to determine the soil erosion rates in and around VNP. The methodology of the study considered descriptive research design that was composed of both quantitative and qualitative approaches. Additionally, primary and secondary data were used. The study population was 52 households from two parishes and the sample of 44 households. The data collection tools were questionnaires and interviews while presentation was by use of figures and tables. The findings indicated that in the past three decades, as the population increased, the forest ecosystem area reduced and this affected the regulation of the amount of carbon stock. Also, the results revealed that the rainfall and temperature patterns fluctuate frequently due to the unregulated accumulated carbon dioxide and carbon in the atmosphere. The findings further showed that the rates of soil erosion increased as deforestation increases which led to increased soil erosion and runoff. As a result of soil erosion and runoff, the soil fertility decreased and it affected the crop harvests. In conclusion ecosystem degradation affected the regulation services which also affected the host community. It was recommended that deforestation should be stopped to improve regulating service.

Nature-based Solutions in Latin America and the Caribbean: Support from the Inter-American Development Bank

Governments across Latin America and the Caribbean (LAC) face challenges in extending and maintaining infrastructure to serve their populations, especially as climate change and ecosystem degradation endanger communities and infrastructure assets across the region. To help address these challenges, the Inter-American Development Bank (IDB) aims to increase its support of Nature-based Solutions (NBS) in accordance with the banks 2020 Environmental and Social Sustainability Mainstreaming Action Plan. This Issue Brief serves two main functions. First, it describes IDB's growing focus on NBS and provides a tour of IDBs main offerings regarding NBS project support and investment. Second, it serves as a baseline of IDBs activities related to NBS from which the bank and partners can build upon moving forward. Going forward, IDB will ramp up support for clients to incorporate NBS considerations and opportunity analysis in country agreements and throughout all stages of project preparation, from investment identification to execution.

Measuring the Semi-Century Ecosystem-Service Value Variation in Mekelle City Region, Northern Ethiopia

The Mekelle city region is facing severe ecosystem degradation. The study area has experienced unprecedented land-use dynamics over the past 47 years, but the effect of these dynamics on ecosystem-service values remains unknown. Estimating the various ecosystem services from a city region perspective has not been attempted so far. The rationale of this study was to estimate the spatial–temporal ecosystem-service value variations. The methodology employed was land-use/land-cover (LULC) datasets of remotely sensed datasets of the years 1972, 1984, 2001, 2012, and 2019, and ecosystem service value coefficient, expert focus group discussion, and document review were used. The digital satellite images were processed, classified, and analyzed using Earth Resource Development Assessment System (ERDAS) Imagine. Computations of changes in the land-use categories were made using Arc GIS 10.5.1, Eviews for time series data analysis, and XLSTAT analytical tools were used. Over the whole study period from 1972 to 2019, a loss of USD 128.6 million was observed, which is a reduction of 501.9%. The study shows that due to land-use changes, the total ecosystem service value is decreasing annually, suggesting that much more severe ecosystem degradation is due to occur. The results are relevant to policy development and indicate that ecological restoration is the best option in the study area.

Food Safety, Security, Sustainability and Nutrition as Priority Objectives of the Food Sector

Food systems are at the center of global environmental, social, and economic challenges such as resource scarcity, ecosystem degradation, and climate change [...]

‘Thinking with Kaipara’: A decolonising methodological strategy to illuminate social heterogenous nature–culture relations in place

Decolonising methodologies continue to be critically developed to disrupt the marginalising approaches to knowledge production. By privileging Indigenous ways of knowing, being and doing, relations with nature are a more-than-human entanglement and a relational pursuit. Ecosystems such as estuaries and rivers are connected through kin-based relationships and treated as (or are) ancestors and family members. Such embodiment connects the body–mind–spirit to maintain relations with the mauri of ancestral beings and Deities. Within this ontology, nature is indistinguishable from culture. Our research responds to the call of how method might proceed to de-centre the human and make bodily and material encounters with the nonhuman matter. ‘Thinking with Kaipara’ is a methodological strategy that is a deliberate attempt to pursue embodied ways of producing knowledge. To work with situated knowledges, place and social difference to address the crisis of representation of such in ecosystem-based management, the problematising of ecosystem degradation and restoration practices. Research data produced is founded on human and nonhuman collaboration, an ethic of care, diverse epistemic nature–culture relations, social/nature/gender justice and equality, which makes for empirical evidence not enjoyed by scientific and technocratic methods utilised to inform and shape ecosystem-based management decisions and policy. Geo-creative practices are used by co-researchers/co-participants to recount their lived experiences and knowledges of ecosystem degradation and restoration. Storytelling, poetics, and painting, sculpting, whaikorero, waiata and writing were practices used. We argue that such geo-creative practices challenge the normative spaces and practices of disciplinary knowledge-making and enable the examination of social heterogeneous nature–culture relations in settler-colonial societies.

Reduced interactivity during microbial community degradation lead to the extinction of Tricholomas matsutake

Ecosystem degradation is a process during which different ecosystem components interact and affect each other. The microbial community, as a component of the ecosystem whose members often display high reproduction rates, is more readily able to respond to environmental stress at the compositional and functional levels, thus potentially threatening other ecosystem components. However, very little research has been carried out on how microbial community degradation affects other ecosystem components, which hampers the comprehensive understanding of ecosystems as a whole. In this study, we investigated the variation in a soil microbial community through the extinction gradient of an ectomycorrhizal species (Tricholomas matsutake) and explored the relationship between microbial community degradation and ectomycorrhizal species extinction. The result showed that during degradation, the microbial community switched from an interactive state to a stress tolerance state, during which the interactivity of the microbial community decreased, and the reduced community interactions with T.matsutake marginalized it from a large central interactive module to a small peripheral module, eventually leading to its extinction. This study highlights the mechanisms of T.matsutake extinction due to the loss of soil microbial community interactivity, offering valuable information about soil microbial community degradation and the plant ectomycorrhizal species conservation.

Mapping the Extent of Mangrove Ecosystem Degradation by Integrating an Ecological Conceptual Model with Satellite Data

Anthropogenic and natural disturbances can cause degradation of ecosystems, reducing their capacity to sustain biodiversity and provide ecosystem services. Understanding the extent of ecosystem degradation is critical for estimating risks to ecosystems, yet there are few existing methods to map degradation at the ecosystem scale and none using freely available satellite data for mangrove ecosystems. In this study, we developed a quantitative classification model of mangrove ecosystem degradation using freely available earth observation data. Crucially, a conceptual model of mangrove ecosystem degradation was established to identify suitable remote sensing variables that support the quantitative classification model, bridging the gap between satellite-derived variables and ecosystem degradation with explicit ecological links. We applied our degradation model to two case-studies, the mangroves of Rakhine State, Myanmar, which are severely threatened by anthropogenic disturbances, and Shark River within the Everglades National Park, USA, which is periodically disturbed by severe tropical storms. Our model suggested that 40% (597 km2) of the extent of mangroves in Rakhine showed evidence of degradation. In the Everglades, the model suggested that the extent of degraded mangrove forest increased from 5.1% to 97.4% following the Category 4 Hurricane Irma in 2017. Quantitative accuracy assessments indicated the model achieved overall accuracies of 77.6% and 79.1% for the Rakhine and the Everglades, respectively. We highlight that using an ecological conceptual model as the basis for building quantitative classification models to estimate the extent of ecosystem degradation ensures the ecological relevance of the classification models. Our developed method enables researchers to move beyond only mapping ecosystem distribution to condition and degradation as well. These results can help support ecosystem risk assessments, natural capital accounting, and restoration planning and provide quantitative estimates of ecosystem degradation for new global biodiversity targets.