Prediksi kepunahan spesies dengan dinamika populasi dan hilangnya habitat

-
Referensi:
Tanentzap A.J., Walker S., Theo Stephens R.T., Lee W.G. (2012). A framework for predicting species extinction by linking population dynamics with habitat loss. Conservation Letters, 5(2): 149-156.

Kebijakan konservasi memerlukan estimasi-estimasi yang kuat mengenai tingkat kepunahan yang mempertimbangkan interaksi antara ukuran populasi (N) dan wilayah habitat. Pendekatan-pendekatan kekinian terhadap estimasi kepunahan dari hubungan antara endemik dan wilayah (EAR) hanya sebatas memperkirakan jumlah minimal dari spesies yang dapat mengalami kepunahan karena hilangnya habitat (instantaneous extinction). Sehingga EAR mengabaikan kepunahan yang dialami oleh populasi dan/atau wilayah habitat (SPHA) yang kecil yang mengalami kepunahan spesies pada masa mendatang. Penelitian ini mempergunakan model matematika dengan asumsi bahwa spesies memerlukan sebuah ukuran populasi yang minimal (sekurang-kurangnya terdiri atas dua individu) dan dengan melakukan sampling acak terhadap hilangnya habitat di dalam plot-plot hutan yang dipetakan menurut stem (stem-mapped forest plots). Selanjutnya, peneliti mengembangkan sebuah kerangka umum untuk memasukkan pengaruh-pengaruh dari SPHA ke dalam EAR.  Dengan mempertimbangkan pengaruh-pengaruh yang memodifikasi N, kerangka yang diperkenalkan di dalam penelitain ini menjelaskan apa yang disebut sebagai extinction debt dan mengurangi ketidakpastian yang berhubungan dengan estimasi-estimasi mendatang mengenai kepunahan melalui kualifikasi yang cermat terhadap konteks ruang dan waktu prediksi.

SJR Impact Factor - Conservation Letters:

SCImago Journal & Country Rank

Popular posts from this blog

Healthcare Waste in the United States Healthcare System

-
How America will pay for healthcare is a subject on the mind of virtually every American today. As Congress determines who will pick up the tab for this important and growing expense, it is worthwhile to take a close look at the cost of healthcare itself. Are there areas where expenses can be cut without undermining the quality of care provided? How prevalent are misuse, overuse, and fraud? This paper tackles the tangled issue of healthcare waste and arrives at some interesting, and perhaps even surprising, conclusions: America’s healthcare system is, indeed, hemorrhaging billions of dollars, and the opportunities to slow the fiscal bleeding are substantial. To organize the evidence supporting claims for the magnitude of waste in the healthcare system,we first suggest a set of categories of waste. For each category, there is a simple definition, a brief description of the examples, and references that allow us to make a reasonable assessment of total annual waste for each category. Ca
Read more

A study of drinking water quality of PDAM

-
One of problems faced by community dealing with water services provided by the State-owned Water Company (PDAM) is inadequacy of the services in fulfilling household needs. Customers often complain because this limited volume of water they can use for daily activities, such the research found in a service quality analysis of drinking water provided by PDAM. The study on service quality may have its cornerstones on three main aspects: the quality, quantity, and continuity.  In case of drinking water quality at the observed location, one should relate it to the quality threshold under the Letter of Decree of the Minister of Health Affairs of the Republic of Indonesia, Kepmenkes RI, No.907/MENKES/SK/VII 2002, which has been applicable since July 28, 2002. In addition, there is also another technique of analysis to measure the water quality level by examining water debit, water pressure, and flow continuity. However, to deal with PDAM’s vision and mission, service quality analysis is lik
Read more

International Forestry LawReducing Emissions from Deforestation and Forest Degradation (REDD) and decentralized forest management

-
Authors: Irawan, S.; Tacconi, L The implementation of a mechanism for Reducing Emissions from Deforestation and Forest Degradation (REDD - plus) will be affected by governance conditions within host countries. The top eight countries, which are responsible for 70 percent of the world's total annual deforestation, have implemented certain forms of decentralization in public administration and forest management. This paper analyzes implications of decentralized forest management for the implementation of REDD. Three possible options for the involvement of local governments in the implementation of REDD are: 1) the central government decides on a national reference level and devolves the implementation to local governments; 2) the central government decides on a national reference level and seeks expressions of interest from local governments to implement REDD in their administrative areas; and 3) the central and local governments decide on a national reference level jointly and loc
Read more