Ecological Effects of Fire School of Forest Resources 森林火灾学校的生态效应.pptVIP

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2017-02-13 发布于上海
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Ecological Effects of Fire School of Forest Resources 森林火灾学校的生态效应.ppt

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Are all fires created equal? Fire regime characteristics dictate fire effects on wildlife What are the fire regime components? Type Season Area burned/ extent Intensity Severity Frequency Synergy Break Fire Effects on Water Water quality may temporarily change: Increases: sediments – soil particles organic detritus turbidity nutrients – especially N, C, bicarbonates of Ca, Mg K water temperature Decreases: aquatic habitat depends on size of fire little evidence of long term habitat deterioration Usually within natural range of variation and/or short-lived effects Fire Control Effects on Water Fire retardants N P into water Some toxicity to fish Fire lines Connect water bodies Create channels Effects on Water - Summary Cumulative effects may include: changes in stream channel morphology organic matter food sources for aquatic fauna amount timing of peak flows …… Properly planned prescribed burn will generally not adversely affect either quality or quantity of ground or surface water in Florida * * * * * * * * * * * * * * * * * * * * * * * * * * * * Plan for Today (2/25/11) Weekly meteorologist Derek Jones Lecture: Fire effects on wildlife, intro. Guest lecture, Louise Venne- fire effects on wading birds in the Everglades Lab: Burn at ACMF? Wildlife and Fire Fire Ecology and Management, 2011 An introduction Adapted from Deborah Kennard Ecological Effects of Fire Basic Premises All ecosystems change over time Fire is neither innately good nor bad; it is just an agent of change Human perception of whether it is good or bad depends on resource objectives Do people think fire is good for wildlife? Even Smokey’s (and his friends’) perceptions vary Light Fire’s Effects on Wildlife Most animal species respond predictably to the passage of fire, although the responses vary among species. Some flee, seek refuge, or rescue young. Other species are attracted to burning areas (forage during fires or feed on charcoal and ash after fires). Effects on Animals:Genera