Assessing climatic change impacts on mangrove structural dynamics on the northern coasts of the Persian Gulf

Monitoring long-term trends in structural changes within mangrove ecosystems is essential for understanding their response to climate change and devising effective adaptation strategies in coastal regions. This study examines changes in mangrove patchiness within the Hara Biosphere Reserve (HBR) alo...

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Published in:ISPRS annals of the photogrammetry, remote sensing and spatial information sciences remote sensing and spatial information sciences, 2024-11, Vol.X-3-2024, p.383-386
Main Authors: Shirmohammadi, Mahdieh, Mafi-Gholami, Davood, Pirasteh, Saied, Youssefi, Fahimeh, Shen, Jie, Li, Weilian, Li, Jonathan
Format: Article
Language:English
Subjects:
Biosphere
Climate change
Coastal ecology
Coastal management
Coastal zone
Coasts
Degradation
Drought
Dynamic structural analysis
Ecosystem services
Ecosystems
Environmental assessment
Environmental degradation
Environmental impact
Habitats
Land degradation
Mangroves
Rainfall
Satellite imagery
Standardized precipitation index
Structural integrity
Trends
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Summary:Monitoring long-term trends in structural changes within mangrove ecosystems is essential for understanding their response to climate change and devising effective adaptation strategies in coastal regions. This study examines changes in mangrove patchiness within the Hara Biosphere Reserve (HBR) along the northern coasts of the Persian Gulf (PG) over a 31-year period (1986-2017), focusing on variations in rainfall patterns and drought occurrences. Employing a 35-year time series of monthly Standardized Precipitation Index (SPI) values alongside satellite imagery analysis, trends in both the number of patches (NP) and the Largest Patch Index (LPI) were assessed at the mangrove stand level. The analysis reveals a significant correlation between structural changes in mangroves and drought events. Pre-1998, characterized by wetter conditions, witnessed a decrease in both NP and LPI, indicating patch expansion and habitat extension. Conversely, post-1998, during drought periods, both indices increased, indicating habitat degradation due to heightened drought intensity. Pre-1998 structural changes in the HBR signify habitat expansion, with increased patch extent and core areas reflecting enhanced structural integrity. However, post-1998, a concerning trend of habitat degradation emerged, with increased NP and LPI attributed to intensified droughts. These findings highlight a transitional period marked by favourable conditions for mangrove growth followed by habitat degradation linked to increased drought intensity. This underscores the vulnerability of mangrove ecosystems to climate change impacts, particularly exacerbated droughts, necessitating urgent efforts for conservation and management to preserve biodiversity and ecosystem services in coastal regions.
ISSN:2194-9050
2194-9042
2194-9050
DOI:10.5194/isprs-annals-X-3-2024-383-2024