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What is biodiversity?

Biodiversity, or biological diversity is the variety of all living life-forms including plants, animals and micro-organisms, the genes they all contain and the ecosystems of which they form a part.

Why is biodiversity important?
Biodiversity encompasses a range of living things and ecosystems, which are constantly evolving and adapting to environmental changes. Our living wealth needs to be maintained and enhanced for our economic, cultural, social and spiritual well-being.

The bioregional approach
Victorian bioregions nest within the national categorisation for terrestrial environments (the Interim Bioregionalisation for Australia, IBRA) and marine environments (the Interim Marine and Coastal Regionalisation for Australia, IMCRA).

Native flora and fauna are inherently diverse and exist within complex systems. There is need for a framework which can both simplify this complexity and connect us more directly to the biodiversity assets and challenges in our own neighbourhoods and working environments. Biogeographic regions (bioregions) capture the patterns of ecological characteristics in the landscape or seascape, providing a natural framework for recognising and responding to biodiversity values. As bioregions reflect underlying environmental features, they can also be related to the patterns of use of land and sea. Five bioregions occur in Victorian waters. The 12 national terrestrial bioregions have been broken down in to 21 Victorian Bioregions.

The bioregional areas are illustrated in the map below. Bioregional networks are being established to facilitate partnerships between the wide range of land managers who share responsibilities for biodiversity conservation.

Victorian Bioregions
Map: Victorian Bioregions

  Lowan Mallee Goldfields Otway Ranges
  Murray Mallee Central Victorian Uplands Warrnambool Plain
  Wimmera Northern Inland Slopes Otway Plain
  Victoria Volcanic Plain Victorian Riverina Gippsland Plain
  Glenelg Plain Victorian Alps Wilsons Promontory
  Dundas Tablelands Highlands - Southern Fall East Gippsland Uplands
  Greater Grampians Highlands - Northern Fall East Gippsland Lowlands
  Otway (Marine) Central Victoria (Marine) Victorian Embayments (Marine)
  Flinders (Marine) Twofold Shelf (Marine)    

  Biogeographic Regions (IBRA) in adjacent States
  Naracoorte Coastal Plain
Warren
South Eastern Highlands
Murray-Darling Depression
NSW South Western Slopes
South East Corner
Riverina
Australian Alps


Victoria’s Biodiversity is characterised by a complexity of 3140 native species of vascular plant, 900 lichens, 750 mosses and liverworts, 111 mammals, 477 birds, 46 freshwater and 600 marine fish, 133 reptiles, 33 amphibians, and an untold number of invertebrates, fungi and algae occurring within hundreds of ecological communities. The Strategy uses a range of tables and charts (illustrated below) to define these assets in each bioregion.

Graph: Land tenure of broad vegetation types, Northern Inland Slopes

Graph: Categories of threatened flora, Victorian Riverina

 

 

Graph: Vascular Flora of the Victorian Alps

 

Native Terrestrial Vertebrates of the Victorian Volcanic Plain
Vertebrates
Victorian Volcanic Plain
Amphibians
20
Birds
434
Mammals
106
Reptiles
47

 

BROAD VEGETATION TYPES IN THE GLENELG PLAIN
Glenelg Plain
Broad Vegetation Types
Pre-European
Area (ha)
% of BVT
Remaining
Coastal Grassy Woodland Complexes
21448
9.4
Heathy Woodland Complexes
373280
51.3
Lowland Forest Complexes
-1
21.4
Plains Grassy Woodland Complexes
42738
20.9

 

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