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Dryandra Woodland - Department of Environment and Conservation ...

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Disturbance Cycles<br />

Animal communities <strong>and</strong> populations are severely disrupted by disturbances such as fire, flood <strong>and</strong><br />

drought. Depending on factors such as season, the species, <strong>and</strong> intensity <strong>of</strong> disturbance, animals may<br />

temporarily disappear or be reduced in numbers. Recovery is by re-invasion from nearby<br />

undisturbed areas <strong>and</strong> expansion <strong>of</strong> resident populations as the vegetation returns (CALM 1992b).<br />

The diversity <strong>of</strong> animal communities <strong>and</strong> populations in <strong>Dry<strong>and</strong>ra</strong> reflects not only the variation in<br />

climate, soils, topography <strong>and</strong> vegetation, but past natural <strong>and</strong> human disturbances.<br />

Corridors<br />

<strong>Dry<strong>and</strong>ra</strong> <strong>Woodl<strong>and</strong></strong> comprises 17 vegetation 'isl<strong>and</strong>s' within a largely cleared l<strong>and</strong>scape. However, in<br />

some cases, corridors <strong>of</strong> uncleared vegetation remain (for example, road reserves), linking the<br />

<strong>Woodl<strong>and</strong></strong>'s remnants. In addition, some local l<strong>and</strong>owners have revegetated areas to form corridors<br />

between remnants. For many animals, movement between blocks is necessary on a daily, seasonal or<br />

intermittent basis, to enable them to find food, shelter, breeding sites or partners (Hussey et al. 1991).<br />

Additional benefits <strong>of</strong> vegetation corridors include:<br />

- provision <strong>of</strong> habitat for plants <strong>and</strong> animals;<br />

- representation <strong>of</strong> the vegetation communities which were present prior to clearing;<br />

- a prominent <strong>and</strong> accessible education resource;<br />

- an improvement in l<strong>and</strong>scape quality; <strong>and</strong><br />

- potential increased farm productivity through prevention <strong>of</strong> erosion, control <strong>of</strong> salinity, <strong>and</strong><br />

provision <strong>of</strong> shade <strong>and</strong> shelter for stock.<br />

There is no formal program in place to monitor the use <strong>of</strong> corridors by native animals at <strong>Dry<strong>and</strong>ra</strong>.<br />

ISSUES<br />

• Five mammal, four bird <strong>and</strong> one reptile species are threatened or in need <strong>of</strong> special protection.<br />

Specific management strategies are required to maintain species' habitats <strong>and</strong> control predators.<br />

• <strong>Dry<strong>and</strong>ra</strong> <strong>Woodl<strong>and</strong></strong> is a source <strong>of</strong> species for translocation to other reserves <strong>and</strong> a possible<br />

location for future releases.<br />

1. The populations <strong>of</strong> some native mammal species have increased in <strong>Dry<strong>and</strong>ra</strong> over recent years.<br />

This increase has primarily been due to the control <strong>of</strong> foxes.<br />

• Native fauna, especially Numbats, Woylies <strong>and</strong> Malleefowl are <strong>of</strong> major interest to visitors (see<br />

Section 14. Tourism <strong>and</strong> Commercial Visitor Services).<br />

• Owing to their limited capacity to survive in saline water, all frogs in the wheatbelt are considered<br />

to be at risk (S<strong>and</strong>ers <strong>and</strong> Harold 1991).<br />

• Little is known <strong>of</strong> the invertebrate fauna (including aquatic fauna) <strong>of</strong> <strong>Dry<strong>and</strong>ra</strong> or <strong>of</strong> their role in<br />

nutrient cycling <strong>and</strong> other ecosystem processes <strong>of</strong> the <strong>Woodl<strong>and</strong></strong>.<br />

• Local Aboriginal people have requested permission to conduct cultural activities, including<br />

hunting, in Quinns Block (see Section 9. Aboriginal Heritage).<br />

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