Skip links and keyboard navigation

Queensland Lake Eyre and Bulloo Freshwater Biogeographic Province

Queensland Lake Eyre and Bulloo Freshwater Biogeographic Province – Introduced fauna—riparian

Wet season (Jan-Apr) Average temperature (23°) Temperature varies along a NW-SE gradient Evaporation exceeds rainfall Width of riparian zone (36m) Small trees Grasses Low relief ratio Cracking clays Percentage of water which is base flow (9%) Annual spate duration (2 months) Annual no-flow duration (6 months) Sand Clay Low macroinvertebrate richness High turbidity Large woody debris cover (8%) Submerged macrophyte growth forms dominant Concave bank shape category Convex bank shape category Dominant bank slope (10°-60°) Fauna Specific example – Life cycle of Hyrtl's catfish

Click on elements of the model or select from the tabs below

increased erosion Altered instream habitat increased erosion Dry stream beds Anoxic conditions Feral pigs Sheep and feral goats Cattle

 

Feral animals and livestock can damage riparian zones, banks, edge habitat and dry stream beds while accessing water and other resources. Pugging, rooting and trampling can accelerate erosion and alter instream sediment dynamics. Soil compaction can also occur along stock trails, reducing water infiltration whilst increasing run-off.

 


Grazing of vegetation by introduced fauna can alter the structural diversity of the riparian vegetation and decrease bank stability.

 


Feral pigs consume native aquatic plants and animals such as freshwater mussels and blueclaw crayfish.

 

 

Dry stream beds provide habitat for invertebrates. These communities reflect the health of dry stream ecosystems.

  Increased erosion produces fine sediment which can remain suspended (turbidity), while coarser sediment can settle and smother benthic habitat.

 

 


  Urine and faeces in and around waterholes can change water quality and increase nutrients which can lead to increased algal growth, reduced oxygen levels and cause anoxic conditions.

 


 
Disturbed areas are more susceptible to weed invasion. Animals can aid in the transport of weeds by transporting them on hair, fur or in faeces.

 

Altered instream habitat can lead to changes in the structure and function of ecological communities and ecosystem processes.         


Last updated: 22 May 2014

This page should be cited as:

Department of Environment and Science, Queensland (2014) Queensland Lake Eyre and Bulloo Freshwater Biogeographic Province – Introduced fauna—riparian, WetlandInfo website, accessed 13 April 2023. Available at: https://wetlandinfo.des.qld.gov.au/wetlands/ecology/aquatic-ecosystems-natural/riverine/lake-eyre-and-bulloo/rfauna.html

Queensland Government
WetlandInfo   —   Department of Environment and Science