Chea Yiing Ling

Forest Department Sarawak · Sarawak Herbarium

Scientific collection and documentation of ferns of Sarawak, Malaysia, began in the 19th century. The first and only enumeration of ferns in Sarawak was published by Parris and Latiff in 1997, presenting a provisional checklist for Malaysia, including Peninsular Malaysia, Sabah, and Sarawak. In this checklist, a total of 615 species of ferns and ly...

In Sarawak, Malaysia, logging is conducted with a 25-year harvesting cycle; however, it remains largely unclear if this cycle length is sufficient for forest recovery. This study aims to investigate how the structure of logged forests recovered along the periods after logging. We conducted this study in the Anap-Muput Forest Management Unit (AMFMU)...

The Red List of Dipterocarpaceae is published, following the efforts of over 50 individuals, from at least 15 organizations, from across the global range of dipterocarps. For the first time, this report contains analysis of all 535 species of Dipterocarpaceae, their global conservation status and builds on national and regional red list publication...

The establishment of a permanent sample plot (PSP) network in Sarawak is to collect scientific data on tree growth, forest structure and species composition from logged-over forest areas particularly the forest management unit (FMU). Scientific data provide evidence on changes in the forest over a period of time due to harvesting operation. Additio...

Twelve new species and one new record of Begonia (Begoniaceae) from Sarawak, Malaysia, are described. All species belong to Begonia sect. Petermannia. Three species are recorded from Totally Protected Areas, one species occurs both within and outside Totally Protected Areas, and eight species occur only outside Totally Protected Areas. Species desc...

The study on growth rate and yield are some of the parameters in forest dynamics. The information on these aspects can help to infer better future timber production in a managed tropical rainforest helping in achieving sustainable forest management policy. However, information on these aspects of tropical rainforest in Malaysia is scarce, especiall...

As forest fragmentation continues in many parts of the tropics, the conservation value of forest remnants remains controversial. Our study aimed to assess the structure and tree species diversity of mixed dipterocarp forest remnants from the Planted Forest Zone (PFZ) located in the Bintulu Division, Sarawak, compared with a forest considered relati...

This species is native to all states in Borneo. The species is found in protected areas in these states. Despite this, across the range of the species there is a population decline. The decline is lowest in Sarawak, being below 30% based on habitat loss and Global Forest Watch information. However historically in Sabah the decline in the species is...

Shorea patoiensis is endemic to Borneo. The species is widespread across the island and is well represented in protected areas. There is some decline in the population size, which varies from state to state. In Kalimantan it is suspected to have declined by up to 50% while in Sarawak the decline is lower. The declines in Sabah and Brunei are likely...

A 10-day botanical survey was conducted during the Sarawak Heart of Borneo (HoB) Scientific Expedition in Tama Abu Protected Forest, Ulu Baram, Sarawak, from 15th to 25th August 2017. The scientific expedition was organized by Sarawak Forestry Department, which aim to document the variety of rich flora and fauna in Tama Abu Protected Forest. From t...

Six species of Begonia are recorded from Gunung Penrissen in Padawan District, Sarawak, Malaysia including two new species (Begonia minutitepala and Begonia dasycaulis in Sect. Petermannia) and one new subspecies (Begonia natunaensis subsp. sarawakensis in Sect. Jackia). Detailed illustrated descriptions of the new taxa are provided together with a...

An account of the twenty Begonia species from the Gunung Mulu and Gunung Buda National Parks is presented with illustrated descriptions of five new species (Begonia argentii, B. jokwaniana, B. lansatensis, B. muluensis and B. vulgarioides) and one new record (Begonia chlorocarpa Irmsch. ex Sands). A key for their identification is provided.

Murum Dam in Sarawak is located about 70 km upstream of Bakun Dam, on the rivers Murum, Danum and Plieran, forming a reservoir over an area of 245 km2. The area consists of mainly lowland to hilly mixed dipterocarp forests, with riparian and alluvial forests along the main rivers and streams, as well as patches of mossy and heath forests. Most of t...

Murum Dam in Sarawak is located about 70 km upstream of Bakun Dam, on the rivers Murum, Danum and Plieran, forming a reservoir over an area of 245 km2. The area consists of mainly lowland to hilly mixed dipterocarp forests, with riparian and alluvial forests along the main rivers and streams, as well as patches of mossy and heath forests. Most of t...

Lecanorchis Blume (1856: 188) comprises about 30 species of mycoheterotrophic orchids (Seidenfaden 1978, Hashimoto 1990, Szlachetko & Mytnik 2000, Govaerts et al. 2017) characterized by having numerous, long, thick, horizontal roots produced from a short rhizome, presence of a calyculus (i.e. a cup-like structure located between the base of the per...

Six new species of Begonia, Begonia armykapii S.Julia & C.Y.Ling, Begonia baikoides S.Julia & C.Y.Ling, Begonia papulifolia S.Julia & C.Y.Ling, Begonia rubrobracteolata S.Julia & C.Y.Ling, Begonia tinjanii S.Julia and Begonia triangularis Kiew & C.Y.Ling, are described from the forest areas in central part of Sarawak. All species belong to the sect...

Thrixspermum pulchrum and Thrixspermum tenuicalcar are recorded from the Murum Dam site in Sarawak. Thrixspermum pulchrum is a new record for Borneo and T. tenuicalcar is the first record from Sarawak. The two following species of Thrixspermum (section Dendrocolla) are here recorded from Sarawak for the first time.

A 4-ha sample plot was established at the Arboretum, Semenggoh Forest Reserve to document tree species in this lowland mixed dipterocarp forest. The area assessed contains 2837 trees with diameter at breast height ≥ 10 cm belonging to 60 families, 160 genera and 541species. Euphorbiaceae and Malvaceae (10 genera each) were the most diverse families...

Forest gaps in the CTFS-AA Forest Dynamic Plot and surrounding Lambir Hill NP were studied to understand the relationship between Macaranga spp. species composition and canopy openness, soil type, and altitude. This short study recorded environmental variables within 20 gaps and among 9 species of Macaranga found within a given plot inside the gaps...

To determine whether heat or movement plays a larger role in attracting leeches, two separate experiments were conducted. Each experiment consisted of a treated object and control object placed along an open transect. Three sets of 16 trials were performed on individual leeches for each experiment. Results were scored as reacting to treatment, reac...