Spatio-temporal dynamics of critical ecosystem services in response to agricultural expansion in Rwanda, East Africa

Emmanuel Rukundo, Shiliang Liu, Yuhong Dong, Evariste Rutebuka, Ernest Frimpong Asamoah, Jingwei Xu, Xue Wu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Changing natural landscapes to agricultural land, driven by land demand, have been considered an important driver that limits the ability of landscapes to provide ecosystem services. The decline in ecosystem services in the past are mainly due to anthropogenic farming activities that have been undertaken to satisfy human wellbeing in Africa. Quantifying these declining services over time and space is essential to facilitate sustainable management decisions. In this study, the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model was used to quantify and value the ecosystem services in Rwanda from 1990, 2000, and 2010. From the results, while forest cover declined drastically from 61.1% in 1990 and reached 19.9% in 2010, cropland and settlement areas both expanded from 24.7% to 53.4% and from 0.5% to 1.8%, respectively. These variations have resulted in a decrease in total carbon storage from 439.7 Mt to 230.5 Mt in the 20 years, whereas soil export increased from 135 Mt to 712 Mt in 2010. Farmland expansion accelerated the export of nitrogen and phosphorous from 0.9 Mt to 3.1 Mt and 1.0 Mt to 8.4 Mt, respectively. The water yield increased from 2.04 × 109 m3 in 1990 to 2.20 × 109 m3 in 2010. Further tradeoffs analysis reveals that three ecosystem services including water, soil, and nutrient show strong positive correlations with one another, while carbon service appears to have little relationship with the other services. The strategies to manage ecosystem service trade-offs should incorporate farmers’ knowledge and scientific research aimed at increasing agricultural production and resource efficiency in Rwanda. To ensure sustainability, demographic pressures should not be neglected.

LanguageEnglish
Pages696-705
Number of pages10
JournalEcological Indicators
Volume89
DOIs
Publication statusPublished - Jun 2018

Fingerprint

Rwanda
Eastern Africa
ecosystem service
ecosystem services
agricultural land
farmers knowledge
agricultural resources
water yield
forest cover
valuation
carbon sequestration
agricultural production
space and time
East Africa
Ecosystem services
demographic statistics
farming systems
soil water
sustainability
farmers

Keywords

  • Ecosystem service
  • InVEST model
  • Land use
  • Rwanda
  • Trade-off

Cite this

Rukundo, Emmanuel ; Liu, Shiliang ; Dong, Yuhong ; Rutebuka, Evariste ; Asamoah, Ernest Frimpong ; Xu, Jingwei ; Wu, Xue. / Spatio-temporal dynamics of critical ecosystem services in response to agricultural expansion in Rwanda, East Africa. In: Ecological Indicators. 2018 ; Vol. 89. pp. 696-705.
@article{4360b7154c27459c88fe43582ff591c0,
title = "Spatio-temporal dynamics of critical ecosystem services in response to agricultural expansion in Rwanda, East Africa",
abstract = "Changing natural landscapes to agricultural land, driven by land demand, have been considered an important driver that limits the ability of landscapes to provide ecosystem services. The decline in ecosystem services in the past are mainly due to anthropogenic farming activities that have been undertaken to satisfy human wellbeing in Africa. Quantifying these declining services over time and space is essential to facilitate sustainable management decisions. In this study, the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model was used to quantify and value the ecosystem services in Rwanda from 1990, 2000, and 2010. From the results, while forest cover declined drastically from 61.1{\%} in 1990 and reached 19.9{\%} in 2010, cropland and settlement areas both expanded from 24.7{\%} to 53.4{\%} and from 0.5{\%} to 1.8{\%}, respectively. These variations have resulted in a decrease in total carbon storage from 439.7 Mt to 230.5 Mt in the 20 years, whereas soil export increased from 135 Mt to 712 Mt in 2010. Farmland expansion accelerated the export of nitrogen and phosphorous from 0.9 Mt to 3.1 Mt and 1.0 Mt to 8.4 Mt, respectively. The water yield increased from 2.04 × 109 m3 in 1990 to 2.20 × 109 m3 in 2010. Further tradeoffs analysis reveals that three ecosystem services including water, soil, and nutrient show strong positive correlations with one another, while carbon service appears to have little relationship with the other services. The strategies to manage ecosystem service trade-offs should incorporate farmers’ knowledge and scientific research aimed at increasing agricultural production and resource efficiency in Rwanda. To ensure sustainability, demographic pressures should not be neglected.",
keywords = "Ecosystem service, InVEST model, Land use, Rwanda, Trade-off",
author = "Emmanuel Rukundo and Shiliang Liu and Yuhong Dong and Evariste Rutebuka and Asamoah, {Ernest Frimpong} and Jingwei Xu and Xue Wu",
year = "2018",
month = "6",
doi = "10.1016/j.ecolind.2018.02.032",
language = "English",
volume = "89",
pages = "696--705",
journal = "Ecological Indicators",
issn = "1470-160X",
publisher = "Elsevier",

}

Spatio-temporal dynamics of critical ecosystem services in response to agricultural expansion in Rwanda, East Africa. / Rukundo, Emmanuel; Liu, Shiliang; Dong, Yuhong; Rutebuka, Evariste; Asamoah, Ernest Frimpong; Xu, Jingwei; Wu, Xue.

In: Ecological Indicators, Vol. 89, 06.2018, p. 696-705.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Spatio-temporal dynamics of critical ecosystem services in response to agricultural expansion in Rwanda, East Africa

AU - Rukundo, Emmanuel

AU - Liu, Shiliang

AU - Dong, Yuhong

AU - Rutebuka, Evariste

AU - Asamoah, Ernest Frimpong

AU - Xu, Jingwei

AU - Wu, Xue

PY - 2018/6

Y1 - 2018/6

N2 - Changing natural landscapes to agricultural land, driven by land demand, have been considered an important driver that limits the ability of landscapes to provide ecosystem services. The decline in ecosystem services in the past are mainly due to anthropogenic farming activities that have been undertaken to satisfy human wellbeing in Africa. Quantifying these declining services over time and space is essential to facilitate sustainable management decisions. In this study, the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model was used to quantify and value the ecosystem services in Rwanda from 1990, 2000, and 2010. From the results, while forest cover declined drastically from 61.1% in 1990 and reached 19.9% in 2010, cropland and settlement areas both expanded from 24.7% to 53.4% and from 0.5% to 1.8%, respectively. These variations have resulted in a decrease in total carbon storage from 439.7 Mt to 230.5 Mt in the 20 years, whereas soil export increased from 135 Mt to 712 Mt in 2010. Farmland expansion accelerated the export of nitrogen and phosphorous from 0.9 Mt to 3.1 Mt and 1.0 Mt to 8.4 Mt, respectively. The water yield increased from 2.04 × 109 m3 in 1990 to 2.20 × 109 m3 in 2010. Further tradeoffs analysis reveals that three ecosystem services including water, soil, and nutrient show strong positive correlations with one another, while carbon service appears to have little relationship with the other services. The strategies to manage ecosystem service trade-offs should incorporate farmers’ knowledge and scientific research aimed at increasing agricultural production and resource efficiency in Rwanda. To ensure sustainability, demographic pressures should not be neglected.

AB - Changing natural landscapes to agricultural land, driven by land demand, have been considered an important driver that limits the ability of landscapes to provide ecosystem services. The decline in ecosystem services in the past are mainly due to anthropogenic farming activities that have been undertaken to satisfy human wellbeing in Africa. Quantifying these declining services over time and space is essential to facilitate sustainable management decisions. In this study, the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model was used to quantify and value the ecosystem services in Rwanda from 1990, 2000, and 2010. From the results, while forest cover declined drastically from 61.1% in 1990 and reached 19.9% in 2010, cropland and settlement areas both expanded from 24.7% to 53.4% and from 0.5% to 1.8%, respectively. These variations have resulted in a decrease in total carbon storage from 439.7 Mt to 230.5 Mt in the 20 years, whereas soil export increased from 135 Mt to 712 Mt in 2010. Farmland expansion accelerated the export of nitrogen and phosphorous from 0.9 Mt to 3.1 Mt and 1.0 Mt to 8.4 Mt, respectively. The water yield increased from 2.04 × 109 m3 in 1990 to 2.20 × 109 m3 in 2010. Further tradeoffs analysis reveals that three ecosystem services including water, soil, and nutrient show strong positive correlations with one another, while carbon service appears to have little relationship with the other services. The strategies to manage ecosystem service trade-offs should incorporate farmers’ knowledge and scientific research aimed at increasing agricultural production and resource efficiency in Rwanda. To ensure sustainability, demographic pressures should not be neglected.

KW - Ecosystem service

KW - InVEST model

KW - Land use

KW - Rwanda

KW - Trade-off

UR - http://www.scopus.com/inward/record.url?scp=85042848624&partnerID=8YFLogxK

U2 - 10.1016/j.ecolind.2018.02.032

DO - 10.1016/j.ecolind.2018.02.032

M3 - Article

VL - 89

SP - 696

EP - 705

JO - Ecological Indicators

T2 - Ecological Indicators

JF - Ecological Indicators

SN - 1470-160X

ER -