Implications of land use/land cover dynamics and Prosopis invasion on ecosystem service values in Afar Region, Ethiopia

Shiferaw, Hailu; Bewket, Woldeamlak; Alamirew, Tena; Zeleke, Gete; Teketay, Demel; Bekele, Ketema; Schaffner, Urs; Eckert, Sandra

doi:10.1016/j.scitotenv.2019.04.220

Cited by 153 publications

(104 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Afar region is also located in the Great Rift Valley (between 8°49′ and 14°30′N and between 39°34′ and 40°28′E), and has a semi‐arid climate similar to that in Baringo, with an annual average temperatures of 27.6°C and 564 mm of annual rainfall (Werer Agricultural Station, ). Prior to invasion, the vegetation in Afar and Baringo consisted of a mix between mainly degraded grassland, wooded grassland and shrubland (Kiage, Liu, Walker, Lam, & Huh, ; Shiferaw et al, ). The level of grassland degradation at the time of Prosopis invasion differed between the two regions (Figure ); while in Baringo many of the grasslands were already degraded in the 1970s, degradation of grasslands in Afar was particularly prominent in the decades after the introduction of Prosopis .…”

Section: Methodsmentioning

confidence: 99%

“…The level of grassland degradation at the time of Prosopis invasion differed between the two regions (Figure ); while in Baringo many of the grasslands were already degraded in the 1970s, degradation of grasslands in Afar was particularly prominent in the decades after the introduction of Prosopis . For example, since 1986 some 25% of the perennial grasslands have changed to annual grasslands or to barren land (Shiferaw et al, ). Our sampling mainly took place in degraded grasslands and native woody species were mostly absent from our plots.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Direct and indirect effects of invasive species: Biodiversity loss is a major mechanism by which an invasive tree affects ecosystem functioning

et al. 2019

Self Cite

View full text Add to dashboard Cite

1. Global change, such as exotic invasions, dramatically affects ecosystem functioning. However, the mechanisms behind the impacts are often unclear and despite extensive experimental work, we know little about the importance of biodiversity loss as a component of global change effects in real-world ecosystems. 2. We disentangled several mechanisms by which an exotic invader affected ecosystem functioning in East African drylands in Kenya and Ethiopia. We used structural equation modelling to separate direct effects of a woody invader Prosopis juliflora on a range of ecosystem functions from indirect effects mediated through changes in biodiversity (plant species richness) and ecosystem functioning (herbaceous biomass). We analysed effects on ecosystem functions linked to soil biogeochemical cycling and transfer of energy between trophic levels. 3. We found that the mean size of individual indirect effects mediated by biodiversity and herbaceous biomass was about twice as large as the mean size of individual direct effects of Prosopis on ecosystem functions, showing that indirect effects are an important component of the invader's overall environmental impacts. Changes in both herbaceous biomass and biodiversity were approximately equally important as drivers of indirect effects, indicating that we need to expand our view of indirect effects to consider a wider range of mechanisms. Simple univariate models failed to capture some Prosopis invader effects because positive direct effects on soil stability and predatory invertebrates were counteracted by negative indirect effects on biodiversity or biomass loss. The majority of effects were similar in both study systems. Suggestions that woody invaders are able to | 2661 Journal of Ecology LINDERS Et aL.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Direct and indirect effects of invasive species: Biodiversity loss is a major mechanism by which an invasive tree affects ecosystem functioning

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…Among the various species, P. juliflora is native to Central and South America and it is one of the world's worst invasive species [31]. While P. juliflora was introduced different parts of the world primarily to restore the degraded ecosystems and also to provide additional benefits to the rural community in the form of charcoal, fuelwood and construction materials, as well as to restore the degraded ecosystems [32], P. juliflora has invaded in many places around the world and imposes negative impacts on the ecology and socio-economy [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Sustainability Analysis of Prosopis juliflora (Sw.) DC Based Restoration of Degraded Land in North India

Edrisi

El‐Keblawy

Abhilash

2020

Land

View full text Add to dashboard Cite

Restoration of marginal and degraded lands is essential for regaining biodiversity and ecosystems services, and thereby attaining UN-Sustainable Development Goals. During the last few decades, many fast growing and hardy trees have been introduced worldwide to restore the marginal and degraded lands for ecosystem stability. Unfortunately, most of these introduced species have become invasive and invaded the nearby productive systems, leading to significant biodiversity loss and land degradation. Therefore, it is imperative to conduct a sustainability analysis of the introduced species for necessary course correction and also for preventing the future utilisation of such species for land restoration. With this backdrop, the present study was conducted to analyse the socio-ecological impacts of a widely used species, i.e., Prosopis juliflora (Sw.) DC based restoration of degraded land of Lucknow, North India. For this, ecological (soil quality and plant biodiversity) and social (livelihood) indicators have been studied over a period of two years (2015–16) through direct field sampling and questionnaire-based surveys. While there was a positive difference (p < 0.01) in the key physico-chemical properties of the P. juliflora-invaded soil than the non-invaded site, the belowground microbial load was significantly lower (19.46 × 106 g−1 of soil) in invaded land as compared to the non-invaded one (31.01 × 106 g−1). Additionally, the invasion of P. juliflora had significantly reduced the biodiversity by displacing the local flora such as Achyranthes aspera L., Amaranthus spinosus L., Cynodon dactylon (L.) Pers, Euphorbia hirta L., etc. The invaded area had only eight plant species having an effective number of species (ENS) of 7.2, whereas the non-invaded area had the presence of 26 plant species with an ENS of 23.8. Although the local people utilised P. juliflora as fuelwood mostly during summer and winter seasons, the invasion resulted in a fodder deficit of 419.97 kg household−1 y−1 leading to resource scarcity in the invaded area in comparison to the non-invaded area. Ecodistribution mapping clearly showed that P. juliflora is already found in most of the tropical and subtropical countries (~103) including in India and has become invasive in many countries. Therefore, we recommend that P. juliflora must be wisely used for the land restoration programs targeted during the United Nations Decade of Ecosystem Restoration (2021–2030) as this species has invasive traits and thereby reduces the ecosystem sustainability of the invaded areas.

show abstract

“…We analyzed the spatial and temporal distribution of aquaculture areas from three aspects. Firstly, on the basis of the statistical area, we analyzed the annual dynamic change intensity of marine aquaculture areas in order to obtain the annual development of marine aquaculture in the study area [35][36][37]. In addition, the data for each year we selected are the seasons with the highest breeding density of the year, i.e., January to April.…”

Section: Analysis Methods Of Temporal and Spatial Distribution Of Aquamentioning

confidence: 99%

Sea Surface-Visible Aquaculture Spatial-Temporal Distribution Remote Sensing: A Case Study in Liaoning Province, China from 2000 to 2018

et al. 2019

View full text Add to dashboard Cite

Aquaculture plays an important role in providing food and reducing poverty but it affects environmental change and coastal ecosystems. Remote sensing is a technology that is helpful in the spatial-temporal dynamic monitoring of aquaculture, coastal management, and environmental monitoring. Most research focuses on inland and coastal areas, and little attention is paid to the extensive distribution of marine aquaculture. As an example, we use the freely available Landsat data of the developed marine aquaculture Liaoning Province of China and use the object-oriented automatic extraction method to analyze the spatial and temporal distribution information of marine aquaculture from 2000 to 2018. The accuracy evaluation from the randomly distributed sample points in high-resolution remote sensing images shows that the extraction accuracy for all of the five individual years of aquaculture area was higher than 82%. The results showed that (1) in the past 19 years, the area of marine aquaculture in Liaoning Province showed an increasing trend, which increased from 35.41 km2 in 2000 to 201.83 km2 in 2018, approximately 5.7 times increase in total area, but the growth rate decreased slightly due to government policy and the environmental quality of the sea area. (2) The centroid of offshore aquaculture in Liaoning Province shows a migration pattern to the northeast, in general, extending from the Dalian Bay sea area to the eastern sea area of the Dalian Chengshantou National Nature Reserve of Coastal Landform in the northeastern direction, and the migration distance reached 48.78 km. Moreover, the migration distance between 2005 and 2010 was the largest of all of the periods, reaching 35.43 km. The new marine aquaculture areas are mainly concentrated in the eastern direction of Xiaoyao Bay, the Changshan Islands, and Guanglu Island in Changhai County. (3) The landscape pattern of marine aquaculture in Liaoning Province is split, large-scale aquaculture and small-scale aquaculture are symbiotic, and landscape ecological activities are active. For local managers, this study can provide valuable supporting data for the assessment of marine aquaculture yield in this region, comprehensive control and management of the marine environment, and stability of the marine ecosystem. For other countries or regions, this work provides a great reference value for monitoring the dynamic spatial distribution of marine aquaculture.

show abstract

Implications of land use/land cover dynamics and Prosopis invasion on ecosystem service values in Afar Region, Ethiopia

Cited by 153 publications

References 71 publications

Direct and indirect effects of invasive species: Biodiversity loss is a major mechanism by which an invasive tree affects ecosystem functioning

Direct and indirect effects of invasive species: Biodiversity loss is a major mechanism by which an invasive tree affects ecosystem functioning

Sustainability Analysis of Prosopis juliflora (Sw.) DC Based Restoration of Degraded Land in North India

Sea Surface-Visible Aquaculture Spatial-Temporal Distribution Remote Sensing: A Case Study in Liaoning Province, China from 2000 to 2018

Contact Info

Product

Resources

About