Time Series Analysis of Rainfall Using Seasonal ARIMA (SARIMA) and Sama Circular Model (SCM): Study from Vadamaradchi, Jaffna, Sri Lanka

Sellathurai, T.; Sivananthawerl, T.; Sivakumar, S.; Mikunthan, T.; Karunainathan, T.

doi:10.4038/tar.v33i2.8556

Cited by 1 publication

(2 citation statements)

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“…Jaffna district covers an area of 1,025 km 2 [24], and the study area is located in the Jaffna district in the northern province, approximately 18 km away from the Jaffna town center (9 • 43 00.4" N 80 • 10 30.7" E; Figure 1). The study area is located in the northern avifaunal region, in the arid climatic zone of Sri Lanka [25].…”

Section: Study Areamentioning

confidence: 99%

“…This is a small mangrove sanctuary consisting of five species of true mangroves and 14 mangrove-associated tree species [26]. The average temperature varies from 28.3 to 32.2 • C during the dry season and 25 to 27.7 • C during the wet season [24] and the annual rainfall is approximately 204.8 mm [27]. The Chavakachcheri-Puloli (B75) road has been constructed across the Sarasalai mangrove reserve.…”

Section: Study Areamentioning

confidence: 99%

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Avifaunal Diversity and Abundance in the Proposed Sarasalai Mangrove Reserve, Jaffna, Sri Lanka

Aloysius

Madhushanka

Chandrika

2023

Birds

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Mangrove ecosystems are excellent habitats for migrating and resident birds. The proposed Sarasalai mangrove reserve is located in one of the richest waterbird zones in Sri Lanka. This site has never been properly studied as a single site for its avifaunal diversity. Hence, the present study aims to find avifaunal diversity in the Sarasalai mangrove. Data collection was performed from April to December 2021. Eight permanent sampling stations were demarcated along the existing roads and were visited twice a month to collect bird abundance data. A total of 107 bird species belonging to 45 families including 58 waterbird species were recorded in the present study. Bird abundance did not significantly differ among the eight studied sites. Studied sites with the availability of water and good tree cover had the highest Shannon Diversity Index. The mangrove vegetation, with tall grasses, and the high water level were significant factors for bird abundance in some sites. Monthly bird abundance showed a notable increase during the migratory months. Among the recorded bird species, Greater Flamingos showed the highest abundance. Moreover, some rare waterbirds including Indian Spot-billed Duck and Glossy Ibis were commonly recorded. Several putative threats have been recorded during this study, namely unplanned land encroachments, bird hunting, and clearing of mangroves. Although this site has a high value in providing a healthy habitat for many wetland birds, it is yet to be declared a protected area. The lack of a clear boundary and a governing body to protect this area exacerbates its protection issues. Hence, it is proposed that immediate legal actions must be taken to declare this important migratory bird area a mangrove forest reserve.

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Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%