title: Effects of the safe and sound protocol on wellbeing and auditory sensitivities among adults with auditory hypersensitivities.

authors: Khatri, Praveen

abstract: The Safe and Sound Protocol (SSP), an auditory intervention involving specifically filtered music, based on polyvagal theory, is marketed as a listening therapy that regulates the nervous system and is therefore recommended for a range of problems including trauma, anxiety and sensory sensitivities. There is limited research on the effectiveness of this intervention so far. Most studies have been focused on children and adults with autism and therefore, the effectiveness of SSP across different populations remains unclear. Using a single-subject, within-subject multiple baseline experimental design, this study evaluated the effectiveness of the SSP on well-being and auditory sensitivities among people with self-reported auditory hypersensitivities. Eight participants were randomly assigned to filtered (SSP) or non-filtered music conditions. Participants who received unfiltered music intervention were offered the filtered music intervention later. Three out of four chose to receive filtered music intervention.  Psychological distress, positive and negative affect, psychological safety, and auditory sensitivity were measured before and after the intervention and were analysed using reliable change. The daily well-being ratings were taken throughout the study and were analysed using the percentage exceeding the median method. This study did not find any consistent evidence that the SSP reduces auditory hypersensitivity or improves well-being in these participants. Further research is necessary, employing both qualitative and RCT methodologies, to clarify the effects of SSP.

text: Effects of the safe and sound protocol on wellbeing and auditory sensitivities among adults with auditory hypersensitivities. The Safe and Sound Protocol (SSP), an auditory intervention involving specifically filtered music, based on polyvagal theory, is marketed as a listening therapy that regulates the nervous system and is therefore recommended for a range of problems including trauma, anxiety and sensory sensitivities. There is limited research on the effectiveness of this intervention so far. Most studies have been focused on children and adults with autism and therefore, the effectiveness of SSP across different populations remains unclear. Using a single-subject, within-subject multiple baseline experimental design, this study evaluated the effectiveness of the SSP on well-being and auditory sensitivities among people with self-reported auditory hypersensitivities. Eight participants were randomly assigned to filtered (SSP) or non-filtered music conditions. Participants who received unfiltered music intervention were offered the filtered music intervention later. Three out of four chose to receive filtered music intervention.  Psychological distress, positive and negative affect, psychological safety, and auditory sensitivity were measured before and after the intervention and were analysed using reliable change. The daily well-being ratings were taken throughout the study and were analysed using the percentage exceeding the median method. This study did not find any consistent evidence that the SSP reduces auditory hypersensitivity or improves well-being in these participants. Further research is necessary, employing both qualitative and RCT methodologies, to clarify the effects of SSP.

year: 2025

title: Mangrove (Avicennia marina subsp. australasica) litter production and decomposition in a temperate estuary

authors: Gladstone-Gallagher, Rebecca

subjects: detritus

abstract: Mangrove forests can provide important cross-boundary subsidies of organic matter to adjacent habitats through the production, export, decomposition and assimilation of litter. We quantified two of these components in a temperate mangrove forest in Whangamata Harbour, New Zealand: 1) litter production; and 2) decomposition rates as a function of tidal elevation, sediment type and burial depth. Litter traps sampled monthly for a year measured an annual detrital input of 3.24–5.38 t DW ha−1, of which 77% occurred in summer. Decomposition rates depended on litter type, with leaves decomposing faster (63 d to decay by 50%) than pneumatophore and wood material (316 and 460 d, respectively). Buried leaf and wood litter decomposed 1.3–1.4 times slower than litter on the sediment surface; however, tidal elevation and sediment type (mud vs. sand) had no effect. The slow decay of litter (an order of magnitude slower than tropical mangrove litter) suggests that its incorporation into temperate marine food webs may be relatively slow.

text: Mangrove (Avicennia marina subsp. australasica) litter production and decomposition in a temperate estuary Mangrove forests can provide important cross-boundary subsidies of organic matter to adjacent habitats through the production, export, decomposition and assimilation of litter. We quantified two of these components in a temperate mangrove forest in Whangamata Harbour, New Zealand: 1) litter production; and 2) decomposition rates as a function of tidal elevation, sediment type and burial depth. Litter traps sampled monthly for a year measured an annual detrital input of 3.24–5.38 t DW ha−1, of which 77% occurred in summer. Decomposition rates depended on litter type, with leaves decomposing faster (63 d to decay by 50%) than pneumatophore and wood material (316 and 460 d, respectively). Buried leaf and wood litter decomposed 1.3–1.4 times slower than litter on the sediment surface; however, tidal elevation and sediment type (mud vs. sand) had no effect. The slow decay of litter (an order of magnitude slower than tropical mangrove litter) suggests that its incorporation into temperate marine food webs may be relatively slow.

year: 2013

title: Catchment and lake water quality modelling to assess management options for Lake Tutira

authors: McBride, Chris G.

abstract: Lake Tutira is an important ecological, historical and cultural asset to the Hawke’s Bay. It is a highly utilised trout fishery, a popular recreational destination, and is particularly significant to Ngāti Kahungunu, for its historical eel fishery and rongoa (medicinal) harakeke (flax) beds. The lake and its catchment have been substantially altered from their natural condition, including conversion of forested catchment to pasture, invasion by aquatic macrophytes such as Hydrilla sp., the introduction of grass carp (Ctenopharyngaodon idella) for weed management, and diversion of the largest stream inflow, Papakiri Stream (Sandy Creek), away from the lake and directly to the outflow (Mahiaruhe Stream) in the early 1980s. Lake Tutira’s history of poor water quality dates back decades, with Trophic Level Index (TLI; a metric of overall water quality) values from the 1960s similar to recent years, and blooms of cyanobacteria (blue-green algae) recorded as early as the 1970s. Nevertheless, the years since 2010 have been characterised by very poor water quality and particularly severe blooms, sometimes resulting in near-complete loss of oxygen from surface waters and associated fish kill events. This has attracted media attention and provided impetus from community and stakeholders to assess available management options for restoring more natural conditions and improving water quality in the lake. 
This report examines the drivers of poor water quality and algal blooms the lake, and assesses various management options that have either been specifically proposed for Tutira, or have proven effective for other lakes in New Zealand and globally. Here we report on monitoring undertaken by Hawke’s Bay Regional Council in the catchment (surface inflows) and lake. We also apply state-of-the-art computer models for simulating physical, chemical, and biological processes in the catchment and lake. These simulations are then used to evaluate a range of management ‘scenarios’ to provide guidance on the likely effects of management options tested with the model.

text: Catchment and lake water quality modelling to assess management options for Lake Tutira Lake Tutira is an important ecological, historical and cultural asset to the Hawke’s Bay. It is a highly utilised trout fishery, a popular recreational destination, and is particularly significant to Ngāti Kahungunu, for its historical eel fishery and rongoa (medicinal) harakeke (flax) beds. The lake and its catchment have been substantially altered from their natural condition, including conversion of forested catchment to pasture, invasion by aquatic macrophytes such as Hydrilla sp., the introduction of grass carp (Ctenopharyngaodon idella) for weed management, and diversion of the largest stream inflow, Papakiri Stream (Sandy Creek), away from the lake and directly to the outflow (Mahiaruhe Stream) in the early 1980s. Lake Tutira’s history of poor water quality dates back decades, with Trophic Level Index (TLI; a metric of overall water quality) values from the 1960s similar to recent years, and blooms of cyanobacteria (blue-green algae) recorded as early as the 1970s. Nevertheless, the years since 2010 have been characterised by very poor water quality and particularly severe blooms, sometimes resulting in near-complete loss of oxygen from surface waters and associated fish kill events. This has attracted media attention and provided impetus from community and stakeholders to assess available management options for restoring more natural conditions and improving water quality in the lake. 
This report examines the drivers of poor water quality and algal blooms the lake, and assesses various management options that have either been specifically proposed for Tutira, or have proven effective for other lakes in New Zealand and globally. Here we report on monitoring undertaken by Hawke’s Bay Regional Council in the catchment (surface inflows) and lake. We also apply state-of-the-art computer models for simulating physical, chemical, and biological processes in the catchment and lake. These simulations are then used to evaluate a range of management ‘scenarios’ to provide guidance on the likely effects of management options tested with the model.

year: 2017