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  • 1
    Online Resource
    Online Resource
    Characterising the woody vegetation in contrasting habitat types in the lower Fitzroy River, Western Australia
    CSIRO Publishing ; 2022
    In:  Australian Journal of Botany Vol. 70, No. 6 ( 2022-9-14), p. 421-431
    Details
    In: Australian Journal of Botany, CSIRO Publishing, Vol. 70, No. 6 ( 2022-9-14), p. 421-431
    Abstract: Context Riverine systems consist of distinct habitats along a landscape gradient and characterising the composition and structure of vegetation in these habitats can support environmental water-management decisions. However, in many regions, including northern Australia, there is a paucity of hydro-ecological data. Aims We aimed to characterise the species composition and the structure of riparian and floodplain woody vegetation of the lower Fitzroy River. Methods We surveyed woody vegetation in different habitats within the riparian zone and floodplain. Multivariate analysis was used to assess differences in the composition of riparian woody species among the four habitat types and univariate analysis was used to compare vegetation structure, recruitment, and environmental variables among habitats. Key results The composition and the physical structure of woody species differed among habitat types of the lower Fitzroy River, indicating a zonation of riparian and floodplain vegetation in response to fluvial processes and water availability. The floodplain was characterised by sparsely distributed Eucalyptus microtheca and a sparse (∼30%) canopy cover. In contrast, the riverbank habitat type had very large trees (mean basal area = 0.26 m2), with a dense canopy cover (∼80%) and was dominated by Melaleuca argentea, M. leucadendra and Barringtonia acutangula. Both the top of bank and off-channel wetlands represent a more intermediary environment, characterised by greater species richness and greater seedling recruitment. Conclusions Identifying these habitat types and characterising their physical and biological properties, such as the relationship between flooding and the composition of woody species, provides a framework to assist the management of large floodplain river systems.
    Type of Medium: Online Resource
    ISSN: 0067-1924 , 1444-9862
    URL: Article
    DOI: 10.1071/BT22039
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2022
    detail.hit.zdb_id: 1496155-6
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Tasmania's Threatened Fauna Handbook: What, Where and How to Protect Tasmania's Threatened Animals
    CSIRO Publishing ; 2000
    In:  Pacific Conservation Biology Vol. 6, No. 2 ( 2000), p. 175-
    Details
    In: Pacific Conservation Biology, CSIRO Publishing, Vol. 6, No. 2 ( 2000), p. 175-
    Abstract: Australia already has a long list of native species that have become extinct since the arrival of humans in this country. Even longer, however, is the list of flora and fauna currently under threat from human activity. Ongoing clearing, degradation and replacement of native vegetation combined with the invasion of exotic species, not only threatens the survival of endemic flora, but the animals clinging to existence in these vanishing habitats.
    Type of Medium: Online Resource
    ISSN: 1038-2097
    URL: Article
    DOI: 10.1071/PC000175
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2000
    SSG: 12
    SSG: 23
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  • 3
    Online Resource
    Online Resource
    The use of regional and alluvial groundwater by riparian trees in the wet‐dry tropics of northern Australia
    Wiley ; 2021
    In:  Hydrological Processes Vol. 35, No. 5 ( 2021-05)
    Details
    In: Hydrological Processes, Wiley, Vol. 35, No. 5 ( 2021-05)
    Abstract: Riparian trees play a critical role in the ecological function of rivers, yet are threatened by anthropogenic change to the hydrological cycle. Identifying the sources of water used by riparian trees can inform sustainable water policy. We used isotopic analysis complemented by measurements of plant water relations to assess water sources for riparian trees at two sites with contrasting hydrogeological processes; one with an alluvial aquifer overlaying an aquitard, and one where fault‐induced preferential pathways in the aquitard allowed the flow of deeper, older groundwater from a regional aquifer to the alluvium. At both sites, plant water potential, stomatal conductance, and plant water isotope composition in the xylem sap of riparian trees were collected from two landscape positions, the riverbank and floodplain. We used a Bayesian mixing model (MixSIAR) to assess differences in the proportion of water sources for sites and landscape positions. We found that xylem water isotope values differed between the two sites in line with their hydrogeological characteristics, with trees at the regional aquifer site using water sourced from the regional groundwater and trees at the site with only an alluvial aquifer present using a mixture of water sources, with no dominant source identified. Higher plant predawn water potential values at the regional site indicated greater water availability and support the inference that plants were using more groundwater at the regional site compared to the alluvial site. Trees closer to the river had higher isotope values, indicative of surficial water sources i.e. shallow soil water and river water. Our findings show that the water sources used by riparian trees reflect local hydrogeology and resource availability. Water managers should identify and protect plant water sources to ensure maintenance of riparian trees.
    Type of Medium: Online Resource
    ISSN: 0885-6087 , 1099-1085
    URL: Issue
    URL: Article
    DOI: 10.1002/hyp.v35.5
    DOI: 10.1002/hyp.14180
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1479953-4
    SSG: 14
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  • 4
    Online Resource
    Online Resource
    Conceptualizing Hydro-socio-ecological Relationships to Enable More Integrated and Inclusive Water Allocation Planning
    Elsevier BV ; 2019
    In:  One Earth Vol. 1, No. 3 ( 2019-11), p. 361-373
    Details
    In: One Earth, Elsevier BV, Vol. 1, No. 3 ( 2019-11), p. 361-373
    Type of Medium: Online Resource
    ISSN: 2590-3322
    URL: Article
    DOI: 10.1016/j.oneear.2019.10.021
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2019
    detail.hit.zdb_id: 3010257-1
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  • 5
    Online Resource
    Online Resource
    Predicting the occurrence of riparian woody species to inform environmental water policies in an Australian tropical river
    Wiley ; 2021
    In:  Freshwater Biology Vol. 66, No. 12 ( 2021-12), p. 2251-2263
    Details
    In: Freshwater Biology, Wiley, Vol. 66, No. 12 ( 2021-12), p. 2251-2263
    Abstract: River flows are commonly altered by water resource development, with changes to the natural flow regime potentially impacting riparian vegetation. Increasingly, water resource managers seek to design policy to maintain healthy riparian ecosystems. Models that make explicit the relationship between hydrological variables and vegetation can be used by managers to assess vegetation response under different water management scenarios. We determined the potential impact of water‐takeon the spatial distribution of woody riparian plant species in the lower Fitzroy River, in north‐western Australia, an area under pressure to increase water resource development. We undertook a plant survey and developed and applied a joint species distribution model to determine the likelihood of occurrence for 26 woody riparian plant species, mapped species occurrence and assessed the change in species distribution under two water‐take scenarios. We found that the duration of inundation from flood flows was a strong predictor of species occurrence in our joint species distribution model. We identified species associated with wetter environments, as indicated by their effect size for the inundation metric. Under the 300‐Gl water‐take scenario we found little change ( 〈 2%) in species occurrence, but under the 600‐Gl scenario a decline between 5% and 7.4% was predicted for eight species associated with wetter habitats. This decline was generally confined to a localised area. Our approach highlights the usefulness of predictive modelling to identify species most likely to be impacted by water‐take, and the benefit of linking modelling to spatial mapping because it can highlight areas where change is likely to occur. This information can assist management to protect ecologically and culturally important species.
    Type of Medium: Online Resource
    ISSN: 0046-5070 , 1365-2427
    URL: Issue
    URL: Article
    DOI: 10.1111/fwb.v66.12
    DOI: 10.1111/fwb.13829
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 2020306-8
    detail.hit.zdb_id: 121180-8
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    A functional methodology for determining the groundwater regime needed to maintain the health of groundwater-dependent vegetation
    CSIRO Publishing ; 2006
    In:  Australian Journal of Botany Vol. 54, No. 2 ( 2006), p. 97-
    Details
    In: Australian Journal of Botany, CSIRO Publishing, Vol. 54, No. 2 ( 2006), p. 97-
    Abstract: In the past, the phrase ‘environmental allocations of water’ has most often been taken to mean allocation of water to rivers. However, it is now accepted that groundwater-dependent ecosystems are an important feature of Australian landscapes and require an allocation of water to maintain their persistence in the landscape. However, moving from this theoretical realisation to the provision and implementation of a field-based management regime is extremely difficult. The following four fundamental questions are identified as being central to the effective management of groundwater-dependent ecosystems (GDEs): (1) How do we identify GDEs in the field; put another way, which species or species assemblages or habitats are reliant on a supply of groundwater for their persistence in the landscape; (2) what groundwater regime is required to ensure the persistence of a GDE; (3) how can managers of natural resources (principally water and habitats), with limited time, money and other resources, successfully manage GDEs; and (4) what measures of ecosystem function can be monitored to ensure that management is effective? This paper explicitly addresses these questions and provides a step-by-step theoretical and practical framework for providing answers. In particular, this paper provides an introduction to some of the relevant literature and from this, presents a synthesis, presented in the form of a functional methodology for managing groundwater dependent ecosystems.
    Type of Medium: Online Resource
    ISSN: 0067-1924
    URL: Article
    DOI: 10.1071/BT05031
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2006
    detail.hit.zdb_id: 1496155-6
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    Nature's Services: Societal Dependence on Natural Ecosystems
    CSIRO Publishing ; 2000
    In:  Pacific Conservation Biology Vol. 6, No. 3 ( 2000), p. 274-
    Details
    In: Pacific Conservation Biology, CSIRO Publishing, Vol. 6, No. 3 ( 2000), p. 274-
    Abstract: Unprecedented growth and global expansion of human populations over the last 100 years has resulted in the widespread degradation of natural ecosystems. Of equal concern is the basic failure of people to appreciate the ecological, economic and social values of the services natural ecosystems provide and the ultimate impacts of their loss.
    Type of Medium: Online Resource
    ISSN: 1038-2097
    URL: Article
    DOI: 10.1071/PC000274
    Language: English
    Publisher: CSIRO Publishing
    Publication Date: 2000
    SSG: 12
    SSG: 23
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