Diversity and habitat segregation of mangrove grapsoid crabs along the west coast of the Malay Peninsula

2020 ◽  
Vol 71 (8) ◽  
pp. 984
Author(s):  
Laura Ribero ◽  
Phaik Eem Lim ◽  
Rosli Ramli ◽  
Gianluca Polgar
Keyword(s):  
Species Composition ◽  
West Coast ◽  
Coastal Wetlands ◽  
Hot Spot ◽  
Malay Peninsula ◽  
The West ◽  
Ecological Traits ◽  
Management Actions ◽  
Different Types ◽  
Local Extinctions

South-East Asia is a biodiversity hot spot for several different animal and plant taxa, and grapsoid crabs are dominant components of its mangrove macrofauna. However, autecological traits of the species and assemblage structures are still largely undescribed. During the period 2012–14, we surveyed six mainland and insular mangrove sites along the west coast of the Malay Peninsula, four of which had not been investigated previously. Species composition differed among sites with different types of substrate and forest area. Small islands, characterised by coarser intertidal substrates, hosted remarkably different assemblages from mainland systems. Most of the species occurred in a small number of sites, suggesting stenotopic ecological traits or patchy distributions, and a marked variation in species composition and environmental conditions among sites was observed. This suggests that management actions assuming that this region’s coastal wetlands have comparable community compositions may likely lead to local extinctions of species, possibly affecting the regional biodiversity of these systems.

scholarly journals Revisiting the Bujang Valley: A Southeast Asian entrepôt complex on the maritime trade route

2017 ◽  
Vol 28 (2) ◽  
pp. 355-389
Author(s):  
STEPHEN A. MURPHY
Keyword(s):  
World War Ii ◽  
West Coast ◽  
River System ◽  
Southeast Asian ◽  
Malay Peninsula ◽  
World War ◽  
The West ◽  
South And Southeast Asia ◽  
British Colonial ◽  
Trade Route

AbstractIn the early 1830s and 1840s, a British colonial official by the name of Colonel James Low uncovered evidence for an early culture with Indic traits in a river system known as the Bujang Valley. On the west coast of the Thai-Malay peninsula, the Bujang Valley is today located in the Malaysian state of Kedah. However, it wasn't until just before World War II that excavations took place, conducted by H. G. Quaritch Wales and his wife Dorothy. Their discoveries and subsequent publications led to the first real attempts to explain the origins and extent of this civilisation and its place within the larger South and Southeast Asian world. In the intervening years between Quaritch Wales's excavations and the present day, considerably more research has taken place within the Bujang Valley, though this has not been without controversy. Recently claims and counter-claims regarding the antiquity of Hinduism and Buddhism at the site have arisen in some quarters within Malaysia. It therefore seems pertinent that this material be re-evaluated in light of new scholarship and discoveries as well as the prevailing paradigms of interactions between South and Southeast Asia. This paper presents an updated reading of this material and argues that the Bujang Valley should be seen as a cosmopolitan trading port with substantive evidence for the presence of Hinduism and Buddhism.

scholarly journals Diversity, conservation, potential uses, and alien species of lowland plants of Batang Toru, Sumatra, Indonesia

2021 ◽  
Vol 22 (3) ◽  
Author(s):  
Hirmas F. Putra ◽  
Wendy A. Mustaqim
Keyword(s):  
Invasive Species ◽  
Species Composition ◽  
Alien Species ◽  
West Coast ◽  
Invasive Alien Species ◽  
Iucn Red List ◽  
Red List ◽  
The West ◽  
Forest Patches ◽  
Swamp Forest

Abstract. Putra HF, Mustaqim WA. 2021. Diversity, conservation, potential uses, and alien species of lowland plants of Batang Toru, Sumatra, Indonesia. Biodiversitas 22: 1580-1591. A recent field inventory of lowland Sumatran plant diversity was carried out in two close sites of forest patches in the Batang Toru area. These are Muara Upu Swamp Forest and Simulak Anjing Hill Forest. This study aimed to investigate the species composition of two isolated lowland Sumatran forest patches on the west coast of the northern part of the island. The total number of species recorded was 181 species with 131 species known from Simulak Anjing Hill Forest, 54 from Muara Upu Swamp Forest, and only three species recorded from both sites. There are three species endemic to Sumatra, seven species listed as threatened according to the IUCN Red List, one species protected by the Indonesian government, and two are important records for Sumatra. Compared to the published literature, 88 species have been reported to have one or more uses, with 63 species have been used as the source of medicines, 19 as sources of fibers, 18 as the source of vegetables, and several other uses. Sixteen alien species were recorded including four species categorized as 100 world’s worst invasive species. It can be concluded that both areas are a home for important lowland plants of Sumatra as indicated by the presence of threatened, endemic, or poorly documented species. Besides that, there is also a need for concern about the presence of potential invasive alien species.

A regional paleolimnological assessment of the impact of clear-cutting on lakes from the west coast of Vancouver Island, British Columbia

2001 ◽  
Vol 58 (3) ◽  
pp. 479-491 ◽  
Author(s):  
Kathleen Laird ◽  
Brian Cumming ◽  
Rick Nordin
Keyword(s):  
Organic Matter ◽  
Species Composition ◽  
West Coast ◽  
Forest Harvesting ◽  
Diatom Species ◽  
The West ◽  
Clear Cutting ◽  
Before And After ◽  
The Impact ◽  
Reference Lakes

The impact of forest harvesting on lakes within the temperate rainforest on the west coast of Vancouver Island was examined in a paleolimnological study of four lakes that had 35–92% of their watersheds progressively clear-cut over a period of 15–30 years (impact lakes) and four lakes that had experienced little or no known anthropogenic disturbance in their watersheds (reference lakes). Changes in diatom species composition and percent organic matter in the 210Pb-dated sediment cores were compared over the last 100 years in each of the impact lakes before and after the onset of forest harvesting, which began in 1950, and before and after 1950 in the four reference lakes. Only one impact lake showed significant changes in percent organic matter. Significant changes (p < 0.05) in species composition following forest harvesting were detected in all four impact lakes and in one of the four reference lakes. However, the changes in diatom species composition following clear-cutting in the impact lakes were small, with changes in the relative abundance of the most common species being maximally 20%, but more typically 3–10%.

scholarly journals Crew in the West Coast Groundfish Catch Share Program: Changes in Compensation and Job Satisfaction

2019 ◽  
Author(s):  
Erin Steiner
Keyword(s):  
Job Satisfaction ◽  
West Coast ◽  
Well Being ◽  
Median Number ◽  
The West ◽  
Catch Shares ◽  
Management Actions ◽  
The People ◽  
Social Science Study ◽  
Economic Survey

Catch share programs can have far-reaching effects on coastal communities and the people that rely on fishing income, including crew members. Analysis of management actions affecting crew wages and well-being is often limited due to a dearth of available data. We examine crew-related outcomes during the first six years of the West Coast Groundfish Trawl Catch Share Program using two unique datasets – a mandatory economic survey and a voluntary social science study. We find that impacts on crew compensation differ from other catch share programs due to prior conditions of the fishery and also vary by the target species within the program. The median number of crew positions per vessel increased slightly, annual crew days decreased, and crew wage as a percentage of revenue was nearly unchanged, even with the introduction of new costs. Median daily crew compensation increased from \$514 per day to \$776 after implementation of catch shares and annual compensation increased from \$33 thousand to \$39 thousand. Many crew members expressed a lack of support for the program and job satisfaction did not rise with increased wages and fewer days at sea, indicating that job satisfaction is likely influenced by more than compensation and effort.

scholarly journals On the identity of the type species of the planthopper genus Oliarus Stal, 1862, Oliarus walkeri (Stal, 1859) (Hemiptera: Cixiidae)

Zootaxa ◽  
2005 ◽  
Vol 1056 (1) ◽  
pp. 53 ◽  
Author(s):  
HANNELORE HOCH
Keyword(s):  
Geographic Distribution ◽  
West Coast ◽  
Type Species ◽  
Male Copulatory Organ ◽  
Copulatory Organ ◽  
Malay Peninsula ◽  
The West ◽  
Male Specimen ◽  
Type Series ◽  
First Time

Type-material of Oliarus walkeri (Stål, 1859) was re-examined. A supplementary description is given. For the first time, the only male specimen contained in the type series is figured. Published information on the geographic distribution of O. walkeri based on misidentification is corrected: O. walkeri is confirmed to occur on the west coast of the Malay Peninsula (Melaka) and on Borneo (Sarawak). The morphology of the male copulatory organ, the aedeagus, is interpreted, and characters hypothesized here as apomorphic are pointed out.

scholarly journals Climate change-driven losses in ecosystem services of coastal wetlands: A case study in the West coast of Bangladesh

2019 ◽  
Vol 169 ◽  
pp. 273-283 ◽  
Author(s):  
Seyedabdolhossein Mehvar ◽  
Tatiana Filatova ◽  
Motaleb Hossain Sarker ◽  
Ali Dastgheib ◽  
Roshanka Ranasinghe
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
West Coast ◽  
Coastal Wetlands ◽  
The West
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