https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:52591 Tue 17 Oct 2023 15:56:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:41370 Tue 02 Aug 2022 15:06:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:36294 Thu 21 Oct 2021 12:52:59 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:49472 Thu 18 May 2023 14:48:26 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:32704 Thu 12 Jul 2018 11:51:18 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31066 Sus scrofa) are recognised as having significant environmental impacts. Here, we quantify the effect of feral pigs in a catchment (undisturbed by Europeans) in the monsoonal tropics of northern Australia. Field data collected over a 5-year period showed that the areal extent of pig disturbance ranged from 0·3 to 3·3% of the survey area (average 1·2%, σ = 0·9%). Mass of exhumed material was considerable and ranged from 4·3 to 36·0 Mg ha⁻¹ y⁻¹ (average 10·9 Mg ha⁻¹ y⁻¹). The excavations produce surface roughness which acts as sediment traps. Over the 5-year study period, there was no evidence to suggest that pigs produce any rill or gully erosion. There does not appear to be any relationship between rainfall amount and area disturbed or volume of material exhumed. However, a significant positive relationship was observed between number of disturbances and rainfall. The location of any disturbance appears to be random and has no relationship with topography or geomorphic attributes such as slope, upslope contributing area or wetness indices derived from a high-resolution digital elevation model of the site. While pigs are disturbingly relatively large volumes of soil, there is no clear evidence to support any increase in local erosion and soil structural change may be occurring slowly and only be observable over the long term.]]> Sat 24 Mar 2018 07:24:09 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:45777 200%) in the release of exopolysaccharides that facilitated soil aggregate stability. The increase in soil pH was about one unit (from 4.8 to 5.6 in soil A or 4.3–5.3 in soil B) under the influence of individual or co-cultures of the microalgal strains after 90 days. Algalized acid soils exhibited a significant increase in carbon content (29–57%), dehydrogenase activity (>500%) and production of indole acetic acid (200–500%). Thus, the present study reports for the first time on the great potential of green microalgae in amelioration of acid soils besides improving soil health and fertility.]]> Sat 05 Nov 2022 12:27:56 AEDT ]]>