सिद्ज़ नोटबुक: August 2010

27 August 2010

Monsoon Floods 2010 in Pakistan

News this week: This is the effect of monsoon floods on people this year in the sub-continent.

Links to more news:

http://www.bbc.co.uk/news/world-south-asia-11105661

http://edition.cnn.com/2010/WORLD/asiapcf/08/26/pakistan.floods/index.html?hpt=T1#fbid=NRX7Y__tsAF&wom=false

r- and K- Strategies Table

Singh Sir had told us to to create a table about r- and K- strategies. Here is one I found from http://pespmc1.vub.ac.be/papers/r-KselectionQOL.pdf. It is taken from Pianka and Wilson.

Table 1 summarizes the typical differences between organisms that follow either type of strategies [cf. Pianka, 1970; Wilson, 1975].

r-organisms	K-organisms
short-lived	long-lived
small	large
weak, vulnerable	robust, well-protected
fast maturation	slow maturation
prone to take risks	risk averse
opportunistic exploiters	consistent exploiters
less intelligent, experienced...	more intelligent, experienced...
strong sex drive	weak sex drive
reproduce at an early age	reproduce at a late age
large number of offspring	small number of offspring
small relative size at birth	large relative size at birth
little care for offspring	much care for offspring
variable population size	stable population size

Table 1: typical differences between organisms that follow r-strategies (e.g. rabbits, sparrows), respectively K-strategies (e.g. elephants, parrots)

Singh, Singh, Gupta: Ecology, Environment & Resource Conservation

Are you having trouble following our Ecology class? This book was recommended by our seniors. They said it was very helpful.

It is available in our department library. Also available to buy in photocopy form in Lanka. It is not available at Student Friends bookstore nor University bookstore in Lanka.

This book has some good topics in it, for example:

Defining Ecology
Characteristics of Population
Life History Strategies, r- and k- selection
Niche
Ecological Succession
Ecosystem Structure, Function and Processes
Food Chain and Food Webs
Ecosystems Nutrient Cycling

Description of the book:

Ecology,Environment & Resource Conservation
Singh, J.S., Singh, S.P. & Gupta, S.R.

This is the first comprehensive textbook of its kind on ecology and environment published in India by three leading ecologists. Every post-graduate student of ecology must have a personal copy.

Over the year, the scope of our scientific understanding and technical skills in ecology and environmental science have widened significantly, with increasingly greater emphasis on societal issues. In this book an attempt has been made to give basic concepts of ecology, environmental science and various aspects of natural resources.

ISBN: 8188342556
List Price: INR 595.00
ISBN-13: 9788188342556 Sale Price: INR 595.00
Publisher: Anamaya Publishers Pages: 688
Language: English