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Emerging themes in Population Consequences of Disturbance models.

ABSTRACT: Assessing the non-lethal effects of disturbance from human activities is necessary for wildlife conservation and management. However, linking short-term responses to long-term impacts on individuals and populations is a significant hurdle for evaluating the risks of a proposed activity. The Population Consequences of Disturbance (PCoD) framework conceptually describes how disturbance can lead to changes in population dynamics, and its real-world application has led to a suite of quantitative models that can inform risk assessments. Here, we review PCoD models that forecast the possible consequences of a range of disturbance scenarios for marine mammals. In so doing, we identify common themes and highlight general principles to consider when assessing risk. We find that, when considered holistically, these models provide valuable insights into which contextual factors influence a population's degree of exposure and sensitivity to disturbance. We also discuss model assumptions and limitations, identify data gaps and suggest future research directions to enable PCoD models to better inform risk assessments and conservation and management decisions. The general principles explored can help wildlife managers and practitioners identify and prioritize the populations most vulnerable to disturbance and guide industry in planning activities that avoid or mitigate population-level effects.

SUBMITTER: Keen KA

PROVIDER: S-EPMC8385386 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:BackgroundAdults with adverse childhood experiences and exposure to adverse life events experience a diverse array of physical, mental, and social health problems across their lifespan. Adult exposure to emotional trauma, physical injury, or other adverse life events may result in the development of post-traumatic stress and post-traumatic stress disorder. Understanding individuals' response to stress and their coping strategies is as important as the stimulus or the causes of the stress for effective stress management interventions.MethodsThis is a mixed quantitative and qualitative online survey study which explores the coping strategies to stress in adults with adverse childhood experiences and exposure to adverse life events through analysis of emerging themes from survey questionnaire responses of study participants.ResultsParticipants who respond to stress through adaptive coping focused either on problem-solving, 17.6% (32 out of 188), or on emotion-focused coping, 45.2% (85 out of 188). Participants engaged in problem-solving mainly through therapy such as counseling and other professional stress management, whereas those who chose emotion-focused coping used diverse strategies including practicing mindfulness, meditation, and yoga; using humor and jokes; seeking higher power or religious pursuits; engaging in physical or breathing exercises; and seeking social support. Participants who practiced maladaptive coping styles constituted 37.2% (70 out of 188) of respondents and resorted to avoidance of the stressful condition, withdrawal from a stressful environment, disengagement from stressful relationships, and use and abuse of drugs and/or alcohol.ConclusionAn understanding of emerging themes in coping strategies calls for collaborative and multidisciplinary approaches in the design, implementation, and execution of health education and promotion programs tailored to meet the diverse needs of priority populations. Stress management educators need to take into account the vulnerabilities of individuals who resort to maladaptive coping and institute evidence-based behavioral and social service intervention strategies, including life skills training, to prevent the consequences of maladaptive coping and to enhance the self-efficacy of individuals to cope more effectively with stress and stressful life events.

Project description:Disturbance-mediated species loss has prompted research considering how ecosystem functions are changed when biota is impaired. However, there is still limited empirical evidence from natural environments evaluating the direct and indirect (i.e. via biota) effects of disturbance on ecosystem functioning. Oxygen deficiency is a widespread threat to coastal and estuarine communities. While the negative impacts of hypoxia on benthic communities are well known, few studies have assessed in situ how benthic communities subjected to different degrees of hypoxic stress alter their contribution to ecosystem functioning. We studied changes in sediment ecosystem function (i.e. oxygen and nutrient fluxes across the sediment water-interface) by artificially inducing hypoxia of different durations (0, 3, 7 and 48 days) in a subtidal sandy habitat. Benthic chamber incubations were used for measuring responses in sediment oxygen and nutrient fluxes. Changes in benthic species richness, structure and traits were quantified, while stress-induced behavioral changes were documented by observing bivalve reburial rates. The initial change in faunal behavior was followed by non-linear degradation in benthic parameters (abundance, biomass, bioturbation potential), gradually impairing the structural and functional composition of the benthic community. In terms of ecosystem function, the increasing duration of hypoxia altered sediment oxygen consumption and enhanced sediment effluxes of NH(4)(+) and dissolved Si. Although effluxes of PO(4)(3-) were not altered significantly, changes were observed in sediment PO(4)(3-) sorption capability. The duration of hypoxia (i.e. number of days of stress) explained a minor part of the changes in ecosystem function. Instead, the benthic community and disturbance-driven changes within the benthos explained a larger proportion of the variability in sediment oxygen- and nutrient fluxes. Our results emphasize that the level of stress to the benthic habitat matters, and that the link between biodiversity and ecosystem function is likely to be affected by a range of factors in complex, natural environments.

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Emerging themes in Population Consequences of Disturbance models.

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