عنوان

Soil Microbial Diversity and Litter Decomposition Increase with Time Since Land Use Disturbance in Tropical Montane Forests of Malaysian Borneo

شماره

TLpq2405301597

زبان متن نوشتاري يا گفتاري و مانند آن

انگلیسی

عنوان اصلي

Soil Microbial Diversity and Litter Decomposition Increase with Time Since Land Use Disturbance in Tropical Montane Forests of Malaysian Borneo

نام عام مواد

[Thesis]

نام نخستين پديدآور

Sniegocki, Renee

نام ساير پديدآوران

Naithani, Kusum J.

نام ناشر، پخش کننده و غيره

University of Arkansas

تاریخ نشرو بخش و غیره

2020

نام خاص و کميت اثر

60

جزئيات پايان نامه و نوع درجه آن

M.S.

کسي که مدرک را اعطا کرده

University of Arkansas

امتياز متن

2020

متن يادداشت

Logging and forest conversion are occurring at alarming rates in the tropical forests of Southeast Asia. These disturbances alter soil chemistry, microbial diversity, and disrupt carbon cycling through shifts in litter decomposition. Direct links between microbial diversity and soil properties such as pH are well established; however, the indirect impacts of logging and forest conversion on microbial diversity and litter decomposition are poorly understood. We used surface (5 cm) soil to assess soil physicochemical properties, next-generation DNA sequencing to assess soil microbial diversity, and standardized litterbags to assess litter decomposition stabilization at five sites along a land use disturbance gradient in the tropical montane forests of Sabah state in eastern Malaysia. We used a hierarchical approach to explore how land use disturbance affects soil properties; how those soil properties in conjunction with land use disturbance affect soil microbial diversity; and how each of those factors affects litter decomposition and stabilization. We show that soil pH, total nitrogen, and bacterial diversity increase with time since disturbance; and sulfur, total carbon, percent sand, soil organic matter, and fungal diversity display a peaked response with peak around 100 years since the last disturbance. Fungal diversity is positively correlated with onsite forest cover, litter decomposition rate, and litter stabilization. Bacterial diversity shows a positive linear relationship with litter decomposition rates, but a peaked relationship with litter stabilization with peak around the mid-range of bacterial diversity. In summary, soils of the older forests harbor significantly greater microbial diversity and stabilize greater amounts of litter than soils of the younger forests and converted sites. Our results suggest that logging and forest conversion significantly affect soil microbial diversity and have lasting effects on carbon cycling in tropical montane forests.

موضوع مستند نشده

Ecology

مستند نام اشخاص تاييد نشده

Naithani, Kusum J.

مستند نام اشخاص تاييد نشده

Sniegocki, Renee

نام الکترونيکي

فرمت انتشار

p

نوع ماده

[Thesis]

کد کاربرگه

276903

سطح دسترسي

a

تكميل شده

Y