Soil Chemical Analysis of Secondary Forest 30 Years after Logging Activities at Krau Wildlife Reserve, Pahang, Malaysia

Amlin, Gufrin; Suratman, Mohd Nazip; Isa, Nurun Nadhirah Md

doi:10.1016/j.apcbee.2014.01.014

Cited by 11 publications

(12 citation statements)

References 5 publications

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“…Nevertheless, not all regenerating trees will reach adult stages because they are subjected to multiple stresses (e.g. pest pressure, light, water and nutrient limitation), which can cause the gradual disappearance of some species (Majumdar and Datta 2014; Comita 2014; Amlin et al 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Also, the small diameters in ADS may be due to the higher population density of seedlings and saplings than in CFS; competition for available resources is likely greater, hence affecting the size of seedlings and saplings more than adult trees (Sundarapandian and Swamy 2013). The competition seems to be severe, especially when soil organic matter is a limiting factor as in the case of crop-agriculture and livestock grazing disturbed sites (Amlin et al 2014).…”

Section: Discussionmentioning

confidence: 99%

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Investigation of tropical coastal forest regeneration after farming and livestock grazing exclusion

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Chen

2018

J. For. Res.

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It is critical to understand how forests regenerate after the exclusion of human induced disturbances because the regenerating species drive the renewal of resources and ecosystems, which in turn support human beings locally and globally. This study of forest regeneration was conducted in the tropical coastal forest ecosystems of Tanzania at Uzigua Forest Reserve (24,730 ha) in the Pwani Region. We collected data from adult trees in 47 sampling plots (25 9 25 m) randomly established in closed forest sites (control) and in sites disturbed by farming and livestock grazing. Sapling and seedling data were collected and analyzed in 2 9 2 m nested subplots. Plots in the closed forest had higher mean basal area and volume for adult trees than those in sites disturbed by farming and livestock grazing. Plots in sites disturbed by farming had the highest Shannon-Wiener index for seedlings and saplings, followed by closed forest and livestock grazed sites. Closed plots and farmed plots had higher Simpson's index for seedlings and saplings than in grazed sites. Plots in farmed and livestock-grazed sites had a higher Simpson index for adult trees than in closed sites. Equitability of seedlings and saplings was highest in closed forest sites, followed by farmed and livestock grazed sites. Plots disturbed by farming had higher equitability for adult trees than in livestock-grazed and closed sites. Moreover, plots disturbed by farming and grazing had a higher importance value index for seedlings than in closed sites. Plots in closed forests had higher sapling importance values than in farmed and grazed sites. Again, plots in closed forest had a higher importance value for adult trees than in farmed and grazed sites. The differences in tree species subcategories of regeneration across land-use indicates that farming and livestock grazing disturbances create heterogeneous microhabitats, which positively or negatively affects regeneration capacity of species after exclusion.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Investigation of tropical coastal forest regeneration after farming and livestock grazing exclusion

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Chen

2018

J. For. Res.

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Section: Issuesmentioning

confidence: 99%

“…Furthermore, restoring areas following either logging or plantations has proved difficult, with studies showing low soil nutrients even two decades after logging (Amlin et al 2014) and poor regeneration in former plantations in addition around them, especially after the growth of Eucalyptus (due to its allelopathy; Chu et al 2014, Thijs et al 2014. Recent studies have also revealed that not only does aboveground diversity decrease upon the establishment of monocultural plantations, but furthermore there are significant reductions in species diversity in the soil, such as a 45% loss in invertebrates (Barnes et al 2014), meaning that the restoration of ecosystem functioning even upon the removal of the plantation is likely to be slow at best.…”

Section: Issuesmentioning

confidence: 99%

Understanding the drivers ofSoutheastAsian biodiversity loss

2017

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Abstract. Southeast Asia (SE Asia) is a known global hotspot of biodiversity and endemism, yet the region is also one of the most biotically threatened. Ecosystems across the region are threatened by an array of drivers, each of which increases the probability of extinction of species in a variety of ecosystems. These issues are symptomatic of the issues that face the global tropics; however, with around 4 billion people in the wider region and the associated pressures on biodiversity, this region may be under some of the greatest levels of biotic threat. Deforestation rates in SE Asia are some of the highest globally, additionally it has the highest rate of mining in the tropics, around the greatest number of hydropower dams under construction, and a consumption of species for traditional medicines which is a threat to biodiversity globally. In this review, the greatest threats to regional biodiversity in the SE Asian region are discussed. Tree-plantations and deforestation represent one of the most imminent threats, and some countries have already lost over half their original forest cover (i.e., the Philippines, parts of Indonesia), with projections of as much as 98% loss for some regions in the coming decade. Hunting and trade represent a significant threat as demand stems not only for food, but also for medicine, for ornamentation, and as a status symbol. Mining represents a frequently overlooked threat, as the Asian region is one of the greatest exporters of limestone and various minerals globally, and the cost of this to biodiversity is not only through the direct loss of areas for mines, but also through the development of roads that further fragment the landscape, the leakage of heavy metals, and the destruction of limestone karsts, which represent global endemicity hotspots. Reservoir construction, wetland drainage, fires, pollution, invasive species, disease, and finally climate change are also considered. Once each issue has been discussed, the overall prognosis of regional biodiversity and priority actions to protect SE Asian biodiversity in the future is discussed.

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“…Previous studies show that deforestation results into soil degradation and loss of total nitrogen, organic carbon and phosphorus in the tropics [11]. Forest disturbances affect the properties of soils by causing loss of soil organic matter due to imbalance between materials entering and those leaving the ecosystem [12]. Disturbances affect the interplay between inputs to soil organic matter by increasing or lowering decomposition of above-and belowground plant litter and animal excreta [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Carbon, Nitrogen and Phosphorus in Disturbed and Intact Tropical Coastal Forest Sites in Tanzania

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Chen

2019

IJPSS

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This study investigated and established the variation of soil nitrogen, total carbon and phosphorus across closed forest; crop-agriculture and livestock disturbed sites. The study provides useful information for local management strategies. It sets initial basic data on the soil status of Uzigua Forest Reserve after 50 years of crop-agriculture and livestock grazing pressure. Forty-seven (50 m × 50 m) quadrats were established on each land uses for soil samples collection. Total nitrogen was analyzed by Kjeldahl acid-digestion, total carbon by the Walkley-Black procedures and phosphorus by Bray-II method. The mean values (percentage) were nitrogen = 16.07 ± 0.34, 1.75 ± 0.25, 6.5 ± 0.20; carbon =14.48 ± 0.23, 11.81 ± 0.13, 12.24 ± 0.30; phosphorus =14.12 ± 6.57, 17.74 ± 3.96, and 13.31± 2.86 for closed forest; agriculture disturbed and grazed sites respectively. There was a slightly lower amount of total carbon on crop agriculture disturbed sites than on the livestock grazed land uses. Carbon-nitrogen ratio was higher in closed forests than in the disturbed sites. The relationship between forest degradation and soil nutrient status is an indication that the below-ground nutrient pools are mainly determined by activities, which disturb the above-ground components mainly vegetation. To restore soil fertility status, it is important to establish the management of the disturbed sites through restoration of vegetation and minimization of disturbances.

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Soil Chemical Analysis of Secondary Forest 30 Years after Logging Activities at Krau Wildlife Reserve, Pahang, Malaysia

Cited by 11 publications

References 5 publications

Investigation of tropical coastal forest regeneration after farming and livestock grazing exclusion

Investigation of tropical coastal forest regeneration after farming and livestock grazing exclusion

Understanding the drivers ofSoutheastAsian biodiversity loss

Evaluation of Carbon, Nitrogen and Phosphorus in Disturbed and Intact Tropical Coastal Forest Sites in Tanzania

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