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Analysis of farmland fragmentation in China Modernization Demonstration Zone since "Reform and Openness": a case study of South Jiangsu Province.

Cheng L, Xia N, Jiang P, Zhong L, Pian Y, Duan Y, Huang Q, Li M - Sci Rep (2015)

Bottom Line: Our results demonstrated that the total farmland area decreased by ca. 24% and the farmland pattern became fragmented during 1985-2008: core farmland decreased and islet farmland increased.Additionally, the farmland patch density (PD) increased and three other landscape indices (NLSI, MESH, and COHESION) showed significant decreases.Therefore, the primary task of farmland protection should be to preserve contiguous farmlands and reduce scattered patches in order to promote farmland connectivity.

View Article: PubMed Central - PubMed

Affiliation: 1] Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China [2] Collaborative Innovation Center for the South Sea Studies, Nanjing University, Nanjing 210093, China [3] Department of Geographic Information Science, Nanjing University, Nanjing 210093, China [4] Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing University, Nanjing, China.

ABSTRACT
Farmland is a fundamental resource for human survival and development. However, farmland fragmentation has become a serious problem, causing ecological damage and low crop production efficiency in many parts of the world. Based on remote sensing and socioeconomic data, we used landscape pattern indices, Morphological Spatial Pattern Analysis (MSPA), and Markov chain models to analyze the temporal and spatial pattern changes in farmland in South Jiangsu Province (the first "Modernization Demonstration Zone" in China) during 1985-2010. Our results demonstrated that the total farmland area decreased by ca. 24% and the farmland pattern became fragmented during 1985-2008: core farmland decreased and islet farmland increased. Additionally, the farmland patch density (PD) increased and three other landscape indices (NLSI, MESH, and COHESION) showed significant decreases. Although the fragmentation rate slowed after 2008, the convergence rate to a stationary farmland distribution became faster, and transitions tended to be less deterministic after 2000. Economic and population growth and policy changes positively contributed to this phenomenon. Therefore, the primary task of farmland protection should be to preserve contiguous farmlands and reduce scattered patches in order to promote farmland connectivity.

No MeSH data available.


Related in: MedlinePlus

Landscape index changes (a,b; top) for farmland, including the patch density (PD), the normalized landscape shape index (NLSI), COHESION, and the effective MESH size (MESH). Changes in the proportion of different MSPA types for the entire farmland area (c,d; middle). Changes in the number of practitioners (P), agricultural practitioners (AP), the relative proportion of AP (PAP), the regional Gross Domestic Production (GDP), the regional Gross Agricultural Production (GAP) and the proportion of GAP (PGAP) (e,f; bottom) in South Jiangsu Province during 1985–2010. The figure was generated by L.Z. and Y.P. using Origin 8.5 (http://www.originlab.com/).
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f1: Landscape index changes (a,b; top) for farmland, including the patch density (PD), the normalized landscape shape index (NLSI), COHESION, and the effective MESH size (MESH). Changes in the proportion of different MSPA types for the entire farmland area (c,d; middle). Changes in the number of practitioners (P), agricultural practitioners (AP), the relative proportion of AP (PAP), the regional Gross Domestic Production (GDP), the regional Gross Agricultural Production (GAP) and the proportion of GAP (PGAP) (e,f; bottom) in South Jiangsu Province during 1985–2010. The figure was generated by L.Z. and Y.P. using Origin 8.5 (http://www.originlab.com/).

Mentions: The PD of farmland landscape (Fig. 1a,b) in study area generally increased during 1995–2008, and decreased slightly during 1985–1995 and 2008–2010. The NLSI, COHESION and MESH indices, decreased synchronously during 1985–2010. The reduction rate for these three indices increased after 2000, but eased off after 2008. The change in the PD, COHESION and MESH indices reflected that farmland fragmentation became more significant. The NLSI was very low (<0.1) during 1985–2010, indicating that the type of farmland shape was relatively rare. In summary, these four indices suggested increased fragmentation of the farmland landscape in South Jiangsu during 1985–2010.


Analysis of farmland fragmentation in China Modernization Demonstration Zone since "Reform and Openness": a case study of South Jiangsu Province.

Cheng L, Xia N, Jiang P, Zhong L, Pian Y, Duan Y, Huang Q, Li M - Sci Rep (2015)

Landscape index changes (a,b; top) for farmland, including the patch density (PD), the normalized landscape shape index (NLSI), COHESION, and the effective MESH size (MESH). Changes in the proportion of different MSPA types for the entire farmland area (c,d; middle). Changes in the number of practitioners (P), agricultural practitioners (AP), the relative proportion of AP (PAP), the regional Gross Domestic Production (GDP), the regional Gross Agricultural Production (GAP) and the proportion of GAP (PGAP) (e,f; bottom) in South Jiangsu Province during 1985–2010. The figure was generated by L.Z. and Y.P. using Origin 8.5 (http://www.originlab.com/).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4488744&req=5

f1: Landscape index changes (a,b; top) for farmland, including the patch density (PD), the normalized landscape shape index (NLSI), COHESION, and the effective MESH size (MESH). Changes in the proportion of different MSPA types for the entire farmland area (c,d; middle). Changes in the number of practitioners (P), agricultural practitioners (AP), the relative proportion of AP (PAP), the regional Gross Domestic Production (GDP), the regional Gross Agricultural Production (GAP) and the proportion of GAP (PGAP) (e,f; bottom) in South Jiangsu Province during 1985–2010. The figure was generated by L.Z. and Y.P. using Origin 8.5 (http://www.originlab.com/).
Mentions: The PD of farmland landscape (Fig. 1a,b) in study area generally increased during 1995–2008, and decreased slightly during 1985–1995 and 2008–2010. The NLSI, COHESION and MESH indices, decreased synchronously during 1985–2010. The reduction rate for these three indices increased after 2000, but eased off after 2008. The change in the PD, COHESION and MESH indices reflected that farmland fragmentation became more significant. The NLSI was very low (<0.1) during 1985–2010, indicating that the type of farmland shape was relatively rare. In summary, these four indices suggested increased fragmentation of the farmland landscape in South Jiangsu during 1985–2010.

Bottom Line: Our results demonstrated that the total farmland area decreased by ca. 24% and the farmland pattern became fragmented during 1985-2008: core farmland decreased and islet farmland increased.Additionally, the farmland patch density (PD) increased and three other landscape indices (NLSI, MESH, and COHESION) showed significant decreases.Therefore, the primary task of farmland protection should be to preserve contiguous farmlands and reduce scattered patches in order to promote farmland connectivity.

View Article: PubMed Central - PubMed

Affiliation: 1] Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, 210093, China [2] Collaborative Innovation Center for the South Sea Studies, Nanjing University, Nanjing 210093, China [3] Department of Geographic Information Science, Nanjing University, Nanjing 210093, China [4] Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing University, Nanjing, China.

ABSTRACT
Farmland is a fundamental resource for human survival and development. However, farmland fragmentation has become a serious problem, causing ecological damage and low crop production efficiency in many parts of the world. Based on remote sensing and socioeconomic data, we used landscape pattern indices, Morphological Spatial Pattern Analysis (MSPA), and Markov chain models to analyze the temporal and spatial pattern changes in farmland in South Jiangsu Province (the first "Modernization Demonstration Zone" in China) during 1985-2010. Our results demonstrated that the total farmland area decreased by ca. 24% and the farmland pattern became fragmented during 1985-2008: core farmland decreased and islet farmland increased. Additionally, the farmland patch density (PD) increased and three other landscape indices (NLSI, MESH, and COHESION) showed significant decreases. Although the fragmentation rate slowed after 2008, the convergence rate to a stationary farmland distribution became faster, and transitions tended to be less deterministic after 2000. Economic and population growth and policy changes positively contributed to this phenomenon. Therefore, the primary task of farmland protection should be to preserve contiguous farmlands and reduce scattered patches in order to promote farmland connectivity.

No MeSH data available.


Related in: MedlinePlus