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Tanzania Multi Stakeholder Map - WebNG

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PESTICIDES AND POVERTY<br />

WHAT IS ECOTOXICOLOGY?<br />

ECOTOXICOLOGY: MONITORING<br />

THE IMPACT OF PESTICIDES<br />

Yahya Msangi / Silvani Mng’anya<br />

August 2005<br />

• Relatively a new discipline<br />

• Combines 3 disciplines: chemistry, toxicology,<br />

ecology<br />

• The science is not yet sufficiently developed to<br />

allow accurate predictions but methodological<br />

frameworks & databases are available and these<br />

can assist in risk assessment<br />

• Risk assessment is a TOOL that provide useful<br />

assistance in decision making<br />

• Involves a team of people & range of equipment<br />

1<br />

2<br />

RISK ASSESSMENT<br />

• Predictive exercise about a change or an<br />

intervention (such as pesticide use) that is based on<br />

scientific data, judgements and assumptions<br />

• Identifies significant hazard and estimates the<br />

likelihood of harm to individuals or the environment<br />

• Enables decision to be made about ways to reduce<br />

or eliminate risk (risk management)<br />

• Determine objectively the least damaging and<br />

reasonable option<br />

• Balance of risk against benefit must be ascertained<br />

WHY MONITOR THE ECOLOGY?<br />

• The amount of pesticides that actually<br />

reaches the target is frequently small, much<br />

ends in the environment<br />

• The behaviour of pesticides and their<br />

environmental impact has mainly been<br />

studied in temperate climates, need for<br />

studies in tropical climates<br />

• As CSO / NGO we need ecotoxicological<br />

monitoring skills for the ASP<br />

3<br />

4<br />

DESIGNING AN ECOLOGICAL MONITORING PROGRAMME<br />

A. THE AIMS OF AN ECOLOGICAL MONITORING<br />

PROGRAMME ARE:<br />

• Assessing pesticide impacts<br />

• Selecting ecological processes or wildlife groups to<br />

monitor<br />

• Selecting appropriate sampling or monitoring<br />

methods<br />

• Processing and analysing the data collected<br />

• Interpreting the information<br />

DESIGNING AN ECOLOGICAL MONITORING PROGRAMME Cont’d<br />

B<br />

STAGES IN DEVELOPING AN ECOLOGICAL<br />

MONITORING PROGRAMME<br />

• PHASE I: PLANNING PHASE & RISK ASSESSMENT<br />

Desk Review<br />

Screening i.e. making hazards more explicit:<br />

? identification of the chemical i.e. the physicochemical<br />

& other properties of the pesticide and its<br />

formulation, including its water / oil solubility,<br />

persistence, and its tendency to bio-accumulate in<br />

soil, water, plant or animal tissue.<br />

5<br />

6<br />

146

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