@prefix dcat: . @prefix dct: . @prefix foaf: . @prefix xsd: . a dcat:Dataset ; dct:description """#Tranche1: Project 3.4#\r \r ###Researchers are using freshwater systems as a model to test how degraded ecosystems can be resistant to disruptions – including those that aim to restore them.###\r \r By investigating and understanding what attributes make freshwater ecosystems “unhealthy”, place-based trials can be designed to target undesired species. They can also be tailored to restore processes and support attributes that would nurture desired species, for example taonga (treasured) and mahinga kai (food-gathering source) species. In this way, the project is informs a more holistic approach to freshwater restoration.\r \r **Project Leaders**\r \r - Helen Warburton, University of Canterbury\r \r - Catherine Febria, University of Canterbury """ ; dct:identifier "7ead695c-db0e-4795-b29f-55454183f752" ; dct:issued "2024-07-14T23:43:41.693209"^^xsd:dateTime ; dct:modified "2024-08-05T05:33:11.824829"^^xsd:dateTime ; dct:publisher ; dct:title "Rebuilding Healthy Rivers" ; dcat:distribution , , , , , . a dcat:Distribution ; dct:description """###Negative resistance and resilience: biotic mechanisms underpin delayed biological recovery in stream restoration###\r \r **March 2021**\r \r **Barrett IC, McIntosh AR, Febria CM, Warburton HJ. 2021. [Negative resistance and resilience: biotic mechanisms underpin delayed biological recovery in stream restoration](https://royalsocietypublishing.org/doi/epdf/10.1098/rspb.2021.0354). Proc Biol Sci 288(1947): 20210354.**\r \r **ABSTRACT**\r \r Traditionally, resistance and resilience are associated with good ecological health, often underpinning restoration goals. However, degraded ecosystems can also be highly resistant and resilient, making restoration difficult: degraded communities often become dominated by hyper-tolerant species, preventing recolonization and resulting in low biodiversity and poor ecosystem function. Using streams as a model, we undertook a mesocosm experiment to test if degraded community presence hindered biological recovery. We established 12 mesocosms, simulating physically healthy streams. Degraded invertebrate communities were established in half, mimicking the post-restoration scenario of physical recovery without biological recovery. We then introduced a healthy colonist community to all mesocosms, testing if degraded community presence influenced healthy community establishment. Colonists established less readily in degraded community mesocosms, with larger decreases in abundance of sensitive taxa, likely driven by biotic interactions rather than abiotic constraints. Resource depletion by the degraded community likely increased competition, driving priority effects. Colonists left by drifting, but also by accelerating development, reducing time to emergence but sacrificing larger body size. Since degraded community presence prevented colonist establishment, our experiment suggests successful restoration must address both abiotic and biotic factors, especially those that reinforce the ‘negative’ resistance and resilience which perpetuate degraded communities and are typically overlooked.\r \r **KEYWORDS**\r \r biotic interactions; colonization; priority effects; resistance and resilience""" ; dct:issued "2024-07-15T00:12:08.824103"^^xsd:dateTime ; dct:modified "2024-07-15T00:12:08.824103"^^xsd:dateTime ; dct:title "PAPER: Mechanisms underpinning delayed stream recovery" ; dcat:accessURL . a dcat:Distribution ; dct:description """###Integrative analysis of stressor gradients reveals multiple discrete trait‐defined axes underlie community assembly###\r \r **July 2022**\r \r **Barrett IC, McIntosh AR, Febria CM, Graham SE, Burdon FJ, Pomeranz JPF, Warburton HJ. 2022. [Integrative analysis of stressor gradients reveals multiple discrete trait‐defined axes underlie community assembly](https://esajournals.onlinelibrary.wiley.com/doi/epdf/10.1002/ecs2.4164). Ecosphere 13(7): e4164.**\r \r **ABSTRACT**\r \r The generalizable functional attributes of organisms (traits) relate strongly to their environment across multiple levels of biological organization, making trait-based approaches a powerful mechanistic framework to understand species distributions and community composition in relation to environmental change. To investigate how a wide range of stressor types shape stream macroinvertebrate communities, we conducted an integrative analysis using community and taxon trait information across drying, flooding, eutrophication, fine sediment, and acid mine drainage (AMD) gradients. Each gradient spanned relatively unimpacted to severely impacted sites. To characterize community change in response to stressors, we incorporated abundance-based trait information from all stressor gradients in a single trait-based ordination (nonmetric multidimensional scaling), defining the trait space within which each stressor gradient acted. We hypothesized that different stressors would apply different environmental filters, moving communities along distinct axes in trait space and resulting in communities with definable trait combinations. Particularly strong relationships were associated with anthropogenically derived stressors (fine sediment, eutrophication, and AMD) compared to natural stressors (drying and flooding). Anthropogenic stressors instigated significant movement of communities along multiple axes in trait space, likely driven by limited adaptation to these novel stressors. We demonstrate that trait-based analysis of communities across multiple stressor gradients can support a more comprehensive understanding of how community composition changes than taxonomic methods or investigation of a single stressor type, and could underpin community-focused management actions.\r \r **KEYWORDS**\r \r acid mine drainage; community assembly; community dynamics; disturbance; drying; environmental filter; eutrophication; flooding; traits\r """ ; dct:issued "2024-07-15T00:27:49.562882"^^xsd:dateTime ; dct:modified "2024-07-15T00:27:49.562882"^^xsd:dateTime ; dct:title "PAPER: Stressor gradients reveal trait-defined community assembly" ; dcat:accessURL . a dcat:Distribution ; dct:description """###Biotic interactions could control colonization success during stream restoration###\r \r **December 2023**\r \r **Eglesfield IB, Mcintosh AR, Warburton HJ 2023. [Biotic interactions could control colonization success during stream restoration](https://www.journals.uchicago.edu/doi/epdf/10.1086/728054). Freshwater Science 42(4): 363-374.**\r \r **ABSTRACT**\r \r Biotic interactions involved in colonization are likely important if tolerant aquatic taxa, which have settled first, prevent desired taxa from colonizing when conditions improve. These interactions could be particularly influential during restoration but are poorly understood in streams. We investigated the interactions between 3 stream macroinvertebrate taxa, the snail *Potamopyrgus antipodarum* (Gray, 1843), mayfly nymphs in the genus *Deleatidium*, and caddisfly larvae in the family Conoesucidae, to assess whether order of arrival and competitor identity influence colonization success. In a replicated (n = 5) mesocosm experiment, we added an early colonist—either snails, mayflies, or caddisflies—then added 1 of the other 2 invertebrates and measured colonization success. Snails were competitively dominant over mayflies, reducing their colonization regardless of arrival order. Caddisflies, in comparison, had an inhibitory priority effect on both mayflies and snails, whereas mayflies had an inhibitory priority effect on caddisfly colonization. Last, snails had a facilitative priority effect on caddisfly colonization. These results indicate that competitive dominance and multiple types of priority effects could shape freshwater macroinvertebrate assemblages and, therefore, could inhibit desired taxa from colonizing during restoration efforts. Thus, stream restoration strategies should consider the effects of biotic interactions, including priority effects, on restoration outcomes.\r \r **KEYWORDS**\r \r stream; competition; restoration; priority effect; biotic interactions; colonization; New Zealand mud snails; macroinvertebrates\r """ ; dct:issued "2024-07-15T00:34:22.923341"^^xsd:dateTime ; dct:modified "2024-07-15T00:34:22.923341"^^xsd:dateTime ; dct:title "PAPER: Biotic interactions in stream restoration success" ; dcat:accessURL . a dcat:Distribution ; dct:description """###Ecosystem-size relationships of river populations and communities###\r \r **June 2024**\r \r **McIntosh AR, Greig HS, Warburton HJ, Tonkin JD, Febria CM 2024. [Ecosystem-size relationships of river populations and communities](https://www.sciencedirect.com/science/article/pii/S0169534724000351/pdfft?md5=5a8cd8b7013fc82668efb70dd77fb83f&pid=1-s2.0-S0169534724000351-main.pdf). Trends Ecol Evol 39(6): 571-584.**\r \r **ABSTRACT**\r \r Knowledge of ecosystem-size influences on river populations and communities is integral to the balancing of human and environmental needs for water. The multiple dimensions of dendritic river networks complicate understanding of ecosystem-size influences, but could be resolved by the development of scaling relationships. We highlight the importance of physical constraints limiting predator body sizes, movements, and population sizes in small rivers, and where river contraction limits space or creates stressful conditions affecting community stability and food webs. Investigations of the scaling and contingency of these processes will be insightful because of the underlying generality and scale independence of such relationships. Doing so will also pinpoint damaging water-management practices and identify which aspects of river size can be most usefully manipulated in river restoration.\r \r **KEYWORDS**\r \r scaling; flows; constraints; disturbance; restoration; water""" ; dct:issued "2024-08-05T05:33:11.837429"^^xsd:dateTime ; dct:modified "2024-08-05T05:33:11.837429"^^xsd:dateTime ; dct:title "PAPER: Ecosystem-size relationships of river populations" ; dcat:accessURL . a dcat:Distribution ; dct:description """###Community type and disturbance type interact to determine disturbance response: implications for extending the environmental filter metaphor###\r \r **June 2023**\r \r **Barrett, I.C., McIntosh, A.R. & Warburton, H.J. [Community type and disturbance type interact to determine disturbance response: implications for extending the environmental filter metaphor](https://link.springer.com/content/pdf/10.1007/s42974-023-00149-3.pdf). Community Ecology, 24: 257–269**\r \r **ABSTRACT**\r \r Ecological disturbances act as environmental filters by removing species with particular characteristics, resulting in community types associated with different disturbance histories. However, studies to date on community responses to disturbance have neglected the potential for different community assemblages to display different responses. Using lotic invertebrate communities as a study system, this study investigated the influence of community composition on disturbance response. We undertook a 26-h stream channel experiment to test how distinct invertebrate community types (an undisturbed spring community, flood-disturbed community, and agriculture-disturbed community), shaped by specific disturbance histories and characterised by different species with particular functional groups, responded to additional disturbance of varying types and combinations (an undisturbed control, high-flow, nutrients, sediment, and a combined sediment and nutrients treatment). Invertebrate drift was used as a diagnostic tool to assess community responses. Significant three-way interactions were identified for total invertebrate drift, drift of typically sensitive taxa (Ephemeroptera, Plecoptera and Trichoptera) and drift of cased organisms between community type, disturbance type and time, indicating that disturbance history and corresponding community type influenced community response to disturbance. Differing responses to disturbance between community types were often characterised by specific taxa, likely driven by adaptive traits, but also by phenotypic plasticity and altered biotic interactions. Community responses to the multiple disturbance scenario suggested potential for interactive effects, with differing responses potentially driven by species co-tolerance mechanisms. When determining the impacts of disturbance, our results suggest there is insight to be gained from a broader perspective incorporating multiple community types into future research. This approach could also improve management outcomes, facilitating tailored restoration and conservation strategies.\r \r **KEYWORDS**\r \r Community assembly;\r Community composition;\r Disturbance history;\r Environmental filtering;\r Mesocosm""" ; dct:issued "2024-07-14T23:49:53.796772"^^xsd:dateTime ; dct:modified "2024-07-14T23:49:53.796772"^^xsd:dateTime ; dct:title "PAPER: Community and disturbance interaction impacts" ; dcat:accessURL . a dcat:Distribution ; dct:description """###The potential role of biotic interactions in stream restoration###\r \r **March 2021**\r \r **White BE, McIntosh AR, Febria CM, Warburton HJ 2021. [The potential role of biotic interactions in stream restoration](https://onlinelibrary.wiley.com/doi/epdf/10.1111/rec.13396). Restoration Ecology 29(5): e13396.**\r \r **ABSTRACT**\r \r Biotic interactions perform an important role in structuring freshwater communities; however, these are rarely considered during stream restoration. Degraded stream communities are often dominated by organisms with shell or case protections, such as snails, which are less vulnerable to predation than desired organisms, such as mayflies. Unprotected organisms may be preferentially eaten, limiting biotic restoration success after the physical restoration of degraded stream communities. We investigated whether restoration success depended on differences in vulnerability to predation by testing whether consumption-based interaction strengths (IS) between vulnerable colonizing *Deleatidium* spp. mayflies and upland bullies (*Gobiomorphus breviceps*) changed with different densities of protected *Potamopyrgus antipodarum* snails and whether snails affected *Deleatidium* behavior. *Deleatidium* and fish IS were stronger with fewer *Deleatidium* present, a destabilizing effect on vulnerable prey populations, and less total prey biomass was consumed with higher densities of protected relative to vulnerable prey, potentially having long-term negative effects on predators. Furthermore, mayflies appeared less on surfaces with high snail densities, potentially due to altered resource use. The combination of these biotic interactions could form a barrier to successful biotic restoration by preventing colonization of desired vulnerable prey, through priority effects within the established community. Therefore, considering biotic interactions in stream restoration is important to overcome biotic restoration barriers.\r \r **KEYWORDS**\r \r biotic interactions; colonization; competition; predation; restoration; stream""" ; dct:issued "2024-07-15T00:01:15.023447"^^xsd:dateTime ; dct:modified "2024-07-15T00:01:15.023447"^^xsd:dateTime ; dct:title "PAPER: Biotic interactions in stream restoration" ; dcat:accessURL . a foaf:Organization ; foaf:name "Challenge Inventory" .