es_100_lecture_6-1

1 does does it increase 1 does it reach a stable

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: tio of S:R:F =same for all generations thereafter). What does that look like ? thereafter). Evaluate which transitions contribute most Evaluate to population change ? Once established whole matrix on Once computer and run for generations –what if you change one vital rate by small or large amount ? How sensitive is the model to a change in this one rate ? change Desert tortoise: Gopherus agassizi Gopherus Federally listed ‘threatened” species THREATS: •Raven & crow predation (on younger stages) •Off road vehicles (crushing burrows and animals)—affects all stages •Highways (kill adults because they move around more) •Disease (from captive turtles)-ages affected? •Low reproduction due to poor food (fecundity) Is there an obvious transition that is source of population decline (including low fecundity) ? Populations are declining dramatically... What are most sensitive stages of life cycle ? life Are there management actions that can Are help with this ? help...
View Full Document

This note was uploaded on 12/25/2009 for the course ENV S 100 taught by Professor Staff during the Fall '08 term at UCSB.

Ask a homework question - tutors are online