Reactive Adaptation Research Articles

Multi-depot vehicle routing problem with risk mitigation: Model and solution algorithm

In practice, the execution of plans with vehicle routing components is often subjected to external events since the transporting vehicles can be exposed to various risk factors. This may lead to delivery failure, vehicle breakdown, commodity loses, etc. In this setting, the stakeholders can benefit from logistic planning techniques whereby potential vehicle breakdown and cargo delivery failure can be mitigated by limiting vehicle risk exposure and prioritizing deliveries of larger payloads. In this paper, we propose a cost effective learning-based heuristic technique to minimize the routing cost along with the potential cost due to the risk of vehicle breakdown and cargo delivery failure. The approach is elaborated by means of an illustrative case study, and it is accompanied by benchmark results along with a comparative study. The heuristic solution generation approach can be used to mitigate vehicle routing risk at the planning stage as well as during various proactive and reactive plan adaptation activities in response to the occurrence of exogenous events.

Older adults demonstrate interlimb transfer of reactive gait adaptations to repeated unpredictable gait perturbations

The ability to rapidly adjust gait to cope with unexpected mechanical perturbations declines with ageing. Previous studies, however, have not ensured that gait stability pre-perturbation was equivalent across participants or age groups which may have influenced the outcomes. In this study, we investigate if age-related differences in stability following gait perturbations remain when all participants walk with equivalent stability. We also examine if interlimb transfer of gait adaptations are observed in healthy older adults, by examining if adaptation to repeated perturbations of one leg can benefit stability recovery when the other leg is perturbed. During walking at their stability-normalised walking speeds (young: 1.32 ± 0.07 m/s; older: 1.31 ± 0.13 m/s; normalised to an average margin of stability of 0.05 m), 30 young and 28 older healthy adults experienced ten unpredictable treadmill belt accelerations (the first and last applied to the right leg, the others to the left leg). Using kinematic data, we assessed the margins of stability during unperturbed walking and the first eight post-perturbation recovery steps. Older adults required three more steps to recover during the first perturbation to each leg than the young adults. Yet, after repeated perturbations of the left leg, older adults required only one more step to recover. Interestingly, for the untrained right leg, the older adults could regain stability with three fewer steps, indicating interlimb transfer of the improvements. Age differences in reactive gait stability remain even when participants’ walk with equivalent stability. Furthermore, we show that healthy older adults can transfer improvements in balance recovery made during repeated perturbations to one limb to their recovery following a perturbation to the untrained limb.

Following the ice: adaptation processes of glacier tour operators in Southeast Iceland.

The growing recognition that global climatic change is a pressing reality and that its impacts on humans and ecological systems are inevitable makes adaptation a core topic in climate change research and policymaking. The glacier tourism sector that is highly sensitive towards changing climatic conditions is among the most relevant in this respect. This study aims to examine empirically how adaptation to climate change impacts is practiced by small- and middle-scale glacier tour operators. Data was collected by means of a set of semi-structured interviews with the managers or owners of nine small- or middle-scale tour companies operating in the Vatnajökull National Park in Southeast Iceland and observations of glacier sites where the respondents' companies are operating. The results indicate that all entrepreneurs consider climate change to be a real phenomenon that affects their present daily operations, but they perceive these implications not as significant threats to their business. The interaction of operator's attributes of agency such as firsthand experiences, risk perceptions, and abilities to self-organize, with structural elements of the glacier destination system such as economic rationales and hazard reduction institutions, has shaped and consolidated operators' adaptation processes in the form of a wait-and-see strategy combined with ad hoc reactive adaptation measures and postponed or prevented proactive long-term adaptation strategies.

Transfer of reactive balance adaptation from stance-slip perturbation to stance-trip perturbation in chronic stroke survivors.

Chronic stroke survivors demonstrate the potential to acquire reactive adaptations to external perturbations. However, such adaptations in postural stability and compensatory stepping responses are perturbation-type specific and the ability to generalize such adaptation to an opposing perturbation has not been studied. The study aimed to examine whether improved reactive balance control acquired through prior slip-perturbation training would positively transfer to, or interfere with, the reactive response to an unexpected novel trip. Twenty-six chronic stroke survivors were assigned to either the training group (TR) who received treadmill-induced slips (12 m/s2) while standing followed by a novel trip (16.8 m/s2) or the control group (TC) who experienced a single unannounced trip. The primary outcome measure was postural stability (examined by relative center of mass position (RCoMP) and velocity (RCoMV)) with step length and trunk angle being secondary measures. Perturbation outcome (fall vs recovery) and number of compensatory steps were also recorded. The TR group showed an anterior shift in RCoMP via longer compensatory backward step and reduced number of steps from first to last slip-perturbation (p < 0.05). Post-slip adaptation, the TR group exhibited a more posterior RCoMP on the novel trip along with a longer forward step and decreased trunk flexion compared to the TC group (p < 0.05). Chronic stroke survivors demonstrated improved direction-specific compensatory stepping response on a novel trip-perturbation following reactive adaptation to large-magnitude, stance-slip perturbation training.The present study investigates the ability of chronic stroke survivors to generalize motor adaptation from stance-slip perturbation training to a novel, diametrically opposing trip-perturbation. We report that people with chronic hemi-paretic stroke could execute the acquired adaptation in reactive postural stability to improve reactive stepping responses to a novel stance-trip perturbation via generation of a direction-specific effective compensatory stepping response, such that the training group demonstrated a longer forward compensatory step and better control of postural stability than the control group.

Evaluation of climate change adaptation in the energy generation sector in Colombia via a composite index — A monitoring tool for government policies and actions

The aim of the article is to evaluate the national adaptation to climate change in the energy generation sector in Colombia via a composite index. To build an index, a framework by stages is used, which includes the definition of the main concepts that supports the measurements; the selection of the relevant indicators using a subject matter experts; standardization of the indicators using a mathematic formula regarding the relationship between the variables that represent the adaptation to climate change; and establishment of the weights using an analytic hierarchical process of paired comparisons and the aggregation of indicators to obtain the following three sub-indexes: reactive adaptation, wherein the replacement of hydraulic energy by thermal energy is evaluated; anticipatory adaptation, which measures the gap between the generation of total energy and the demand of the national energy system; and planned adaptation, which considers indicators such as the sectoral plan for adapting to climate change, the law of alternative energies, and the generation of alternative energies as a percentage of generation capacity. By adding these sub-indices, the climate change adaptation index (CCAI) is obtained. The results of CCAI show that progress was made from a reactive adaptation scenario in which the system vulnerability was high to an anticipatory adaptation scenario wherein the vulnerability was average, indicating that the foundations for this sector to build a planned adaptation are currently being laid.

An Amalgamation of Hormone Inspired Arbitration Systems for Application in Robot Swarms

Previous work has shown that virtual hormone systems can be engineered to arbitrate swarms of robots between sets of behaviours. These virtual hormones act similarly to their natural counterparts, providing a method of online, reactive adaptation. It is yet to be shown how virtual hormone systems could be used when a robotic swarm has a large variety of task types to execute. This paper details work that demonstrates the viability of a collection of virtual hormones that can be used to regulate and adapt a swarm over time, in response to different environments and tasks. Specifically, the paper examines a new method of hormone speed control for energy efficiency and combines it with two existing systems controlling environmental preference as well as a selection of behaviours that produce an effective foraging swarm. Experiments confirm the effectiveness of the combined system, showing that a swarm of robots equipped with multiple virtual hormones can forage efficiently to a specified item demand within an allotted period of time.

Coping With a Mass Casualty: Insights into a Hospital's Emergency Response and Adaptations After the Formosa Fun Coast Dust Explosion.

The study provides a comprehensive insight into how an initial receiving hospital without adequate capacity adapted to coping with a mass casualty incident after the Formosa Fun Coast Dust Explosion (FFCDE). Data collection was via in-depth interviews with 11 key participants. This was combined with information from medical records of FFCDE patients and admission logs from the emergency department (ED) to build a detailed timeline of patients flow and ED workload changes. Process tracing analysis focused on how the ED and other units adapted to coping with the difficulties created by the patient surge. The hospital treated 30 victims with 36.3% average total body surface area burn for over 5 hours alongside 35 non-FFCDE patients. Overwhelming demand resulted in the saturation of ED space and intensive care unit beds, exhaustion of critical materials, and near-saturation of clinicians. The hospital reconfigured human and physical resources differently from conventional drills. Graphical timelines illustrate anticipatory or reactive adaptations. The hospital's ability to adapt was based on anticipation during uncertainty and coordination across roles and units to keep pace with varying demands. Adapting to beyond-surge capacity incident is essential to effective disaster response. Building organizational support for effective adaptation is critical for disaster planning.

Reactive behavioural adaptation of service compositions

AbstractWe are assisting to a paradigmatic shift in developing Web applications since their components are often distributed and deployed as services among different organizations. Their logic is based on a set of actions that can be linked together by exploiting higher level languages more suitable to address the scale of the Web. On this multi‐organization scale, applications can be influenced by different context events generated by the environment where they run. Handling these events requires run‐time adaptations of the application's behaviour to react, properly and quickly, to changes. The paper addresses these needs by proposing a programming paradigm based on “autonomic service compositions,” ie, compositions that are able to self‐change their structure, according to a specific life cycle, to allow for the continuation of execution, even if unexpected events arise. The approach exploits autonomic computing and reasoning for taking decision on information collected during processes execution. Autonomic actions on composition structures are performed using Event Condition Action rules and a set of meta‐operations. The approach is detailed, analysed, and discussed with reference to some examples derived from a real‐world application.

Effects of task-specific obstacle-induced trip-perturbation training: proactive and reactive adaptation to reduce fall-risk in community-dwelling older adults.

Trips account for over half of outdoor falls among community-dwelling older adults. To investigate to what extent obstacle-induced trip-perturbation training could reduce fall-risk among older adults and to see whether training effects could be retained short term. Forty community-dwelling older adults were exposed to 24 repeated trip-perturbations given in a "blocked-and-mixed" manner during over-ground gait. Another trip was given 30min post-training. For each trip, recovery strategies and outcomes (fall versus no fall) were analyzed. Within-trial changes to proactive and reactive dynamic center of mass stability, pre-trip toe clearance and trunk angle, trunk angle at recovery completion, and recovery step length were analyzed. 48% of participants fell on their novel trip. The fall rate decreased significantly for subsequent trips, with no falls on the last trip. The decreased fall incidence resulted from improved feedforward and feedback adjustments for controlling center of mass stability and body kinematics. Proactive adaptations included reduced forward center of mass velocity, which lessened forward instability, and larger toe clearance, which increased the likelihood of obstacle avoidance. Reactive adjustments included reduced forward instability and improved trunk control (reduced forward rotation) at recovery step completion. Post-training, training effects were retained in terms of fall incidence, with slight decay in toe clearance and reactive stability. Older adults demonstrated appropriate locomotor-based proactive and reactive adaptations to repeated obstacle-induced trips with short-term retention similar to young adults, and thus could reduce their fall-risk through such training.

Will Adaptation Delay the Transition to Clean Energy Systems? An Analysis with AD-MERGE

Climate change is one of the greatest environmental challenges facing our planet in the foreseeable future, yet, despite international environmental agreements, global GHG emissions are still increasing. In this context, adaptation measures can play an important role in reducing climate impacts. These measures involve adjustments to economic or social structures to limit the impact of climate change without limiting climate change itself. To assess the interplay of adaptation and mitigation, we develop AD-MERGE, an integrated assessment model that includes both reactive (‘flow’) and proactive (‘stock’) adaptation strategies as well as a range of mitigation (energy) technologies. We find that applying adaptation optimally delays but does not prevent the transition to clean energy systems (carbon capture and sequestration systems, nuclear, and renewables). Moreover, applying both adaptation and mitigation is more effective than using just one.

Whole-Body Reactive Agility Asymmetries among Athletes with Concussion History Are Modifiable

PURPOSE: This study assessed whole-body reactive agility adaptations produced by upper extremity training that imposed simultaneous cognitive and visuomotor demands. METHODS: A cohort of 20 elite athletes representing 6 different Olympic sports (12 males: 25.1 ±5.5 years; 8 females: 27.0 ±4.0 years) performed an upper extremity choice reaction time (RT) test, along with 2 tests of whole-body reactive agility (WBRA) that provided measures of RT, speed, acceleration, and deceleration. The upper extremity test used an Eriksen flanker display (10 congruent and 10 incongruent 5-arrow sets) to designate correct responses for manual deactivation of illuminated buttons on opposite sides of the board. Tests of WBRA required lateral movement responses to 20 left or right visual targets and diagonal movement responses to 16 visual targets presented in right/left and forward/back combinations. One-minute training sessions were completed 2 or 3 times per week over a 3-week period, which involved upper extremity button deactivations and verbal responses to indicate center arrow direction for 20 5-arrow displays. Post-training assessment included the same tests administered prior to training. RESULTS: Each of the athletes completed at least 6 training sessions (7.7 ±0.6). Concussion history was reported by 10 athletes (5.6 ±5.2 years prior to testing; range: 0.3 - 16.5 years), which was significantly associated (1-Sided P < .05) with pre-training measures of WBRA asymmetries for backward diagonal deceleration ≥ .24 (OR=14.3 [estimated by adding 0.5 to each cell]; PPV=100%; NPV=63%), lateral acceleration ≥ .12 (OR=5.4; PPV=70%; NPV=70%), backward diagonal acceleration ≥ .10 (OR=6.0; PPV=67%; NPV=75%), and lateral RT ≥ .16 (OR=13.5; PPV=695%; NPV=86%). Among the 12 athletes with self-reported concussion history, the pre- to post-training standardized response mean (SRM) values for the 4 WBRA asymmetries were .22, 45, .32, and .52, respectively. Visuomotor correct choice RT average difference between incongruent and congruent responses improved from 114 ±46 ms to 59 ±80 ms (SRM=.54). CONCLUSION: Asymmetry in reactive responses could be a manifestation of dysfunctional interhemispheric brain connectivity. Our findings suggest that asymmetries can be reduced through dual-task cognitive-visuomotor training.

Perinatal Stress Programs Sex Differences in the Behavioral and Molecular Chronobiological Profile of Rats Maintained Under a 12-h Light-Dark Cycle.

Stress and the circadian systems play a major role in an organism’s adaptation to environmental changes. The adaptive value of the stress system is reactive while that of the circadian system is predictive. Dysfunctions in these two systems may account for many clinically relevant disorders. Despite the evidence that interindividual differences in stress sensitivity and in the functioning of the circadian system are related, there is limited integrated research on these topics. Moreover, sex differences in these systems are poorly investigated. We used the perinatal stress (PRS) rat model, a well-characterized model of maladaptive programming of reactive and predictive adaptation, to monitor the running wheel behavior in male and female adult PRS rats, under a normal light/dark cycle as well as in response to a chronobiological stressor (6-h phase advance/shift). We then analyzed across different time points the expression of genes involved in circadian clocks, stress response, signaling, and glucose metabolism regulation in the suprachiasmatic nucleus (SCN). In the unstressed control group, we found a sex-specific profile that was either enhanced or inverted by PRS. Also, PRS disrupted circadian wheel-running behavior by inducing a phase advance in the activity of males and hypoactivity in females and increased vulnerability to chronobiological stress in both sexes. We also observed oscillations of several genes in the SCN of the unstressed group in both sexes. PRS affected males to greater extent than females, with PRS males displaying a pattern similar to unstressed females. Altogether, our findings provide evidence for a specific profile of dysmasculinization induced by PRS at the behavioral and molecular level, thus advocating the necessity to include sex as a biological variable to study the set-up of circadian system in animal models.

Farmers’ Perception on Irrigation Farming and the Factors Influencing Access to and Size of Irrigable lands in Northern Region, Ghana

Aim: The impacts of climate change and variability requires proactive and reactive adaptation. The high reliance of farmers on rainfed agriculture leads to their high vulnerability to climate change. As an agrarian economy, irrigation farming system is an essential proactive and/or reactive strategy for the increasing erratic rainfalls in Northern Ghana. This study analyzed the perceptions of smallholder farmers on irrigation farming and the factors that influence access to and size of irrigable lands among communities in the catchment of two irrigation dams.&#x0D; Study Design: The study adopted a multi-stage sampling procedure.&#x0D; Place and Duration of Study: The study was conducted in the Northern Region of Ghana. The data for the study was collected in 2014.&#x0D; Methodology: Through a multi-stage sampling, a cross-sectional data was collected from 240 smallholder farmers. These included both irrigation farmers and non-irrigation farmers. The data was analyzed through switching regression and descriptive statistics.&#x0D; Results: The result revealed that water unavailability is not a major challenge to most irrigation farmers. The farmers engaged in irrigation vegetable farming mostly for cash purpose and also perceived a high demand for vegetables, especially in the dry season. From the farmers perception, group membership, distance to irrigable land, cost of irrigable land, leadership characteristics and nativity significantly influenced access to irrigable lands. From the econometric result, experience, farmer group, credit, extension, labour availability and age had significant influence on irrigation farming while education, experience, extension, sex and labour availability significantly influenced the acreage cultivated by the vegetable farmers.&#x0D; Conclusion: The study concluded that, while there is high market potential for irrigated produce, access to and the size of irrigable lands are significantly determined by a mixed of factors. Therefore, while farmers are encouraged to go into irrigation vegetable production, government’s policies such as ‘one village one dam’ should be effectively implemented to realize the needed results.

Does severity of motor impairment affect reactive adaptation and fall-risk in chronic stroke survivors?

BackgroundA single-session of slip-perturbation training has shown to induce long-term fall risk reduction in older adults. Considering the spectrum of motor impairments and deficits in reactive balance after a cortical stroke, we aimed to determine if chronic stroke survivors could acquire and retain reactive adaptations to large slip-like perturbations and if these adaptations were dependent on severity of motor impairment.MethodsTwenty-six chronic stroke participants were categorized into high and low-functioning groups based on their Chedoke-McMaster-Assessment scores. All participants received a pre-training, slip-like stance perturbation at level-III (highest intensity/acceleration) followed by 11 perturbations at a lower intensity (level-II). If in early phase, participants experienced > 3/5 falls, they were trained at a still lower intensity (level-I). Post-training, immediate scaling and short-term retention at 3 weeks post-training was examined. Perturbation outcome and post-slip center-of-mass (COM) stability was analyzed.ResultsOn the pre-training trial, 60% of high and 100% of low-functioning participants fell. High-functioning group tolerated and adapted at training-intensity level-II but low-functioning group were trained at level-I (all had > 3 falls on level-II). At respective training intensities, both groups significantly lowered fall incidence from 1st through 11th trials, with improved post-slip stability and anterior shift in COM position, resulting from increased compensatory step length. Both groups demonstrated immediate scaling and short-term retention of the acquired stability control.ConclusionChronic stroke survivors are able to acquire and retain adaptive reactive balance skills to reduce fall risk. Although similar adaptation was demonstrated by both groups, the low-functioning group might require greater dosage with gradual increment in training intensity.

Reality effects of conflict avoidance in rewilding and ecotourism practices – the case of Western Iberia

ABSTRACTThis paper explores the performative role of conflict avoidance in enabling rewilding and ecotourism visions in Western Iberia, one of the first European rewilding pilots situated in Northeast Portugal. Conflict avoidance is delineated here as a process based on expectations of potentially enduring, mutually contradicting and heated communications. In line with and contributing to a Social Systems Theory of conflicts, various examples of conflict avoidance are described as either a form of proactive anticipation to conflicts as risks or as a reactive adaptation to conflicts as dangers. The findings illustrate various forms of conflict avoidance in terms of silence, materialisation, co-optation, and ad hoc manoeuvring. These forms are subject to different goal dependencies of rewilding and ecotourism visions. Furthermore, these findings support a more critical discussion of the highly co-productive role of latent conflict processes in evolving rewilding and ecotourism practices in places like Western Iberia.

Cities in Asia: how are they adapting to climate change?

Asian cities are at the forefront of climate change impacts. Given the size of city economies, the economic losses caused by climate-induced extreme weather can be quite significant. Together, the cities of Guangzhou, Mumbai, Shenzen, Tianjin, Ho Chi Minh City, Kolkata, and Jakarta incurred $1520 million (USD) in annual losses due to coastal flooding in 2005 alone. By 2050, the annual loss incurred as a result of coastal flooding in these cities is projected to increase to $32,079 million. In the light of the projected increase in climate-induced extreme weather events and associated loss, it is important to understand where Asian cities are in terms of climate change adaptation planning and governance. I use publicly available data and information published between 2004 and 2014 to capture urban climate change adaptation activities implemented in Asian cities, their sectoral distribution, and nature. This research finds that Asian cities are at a very early stage of climate change adaptation planning and governance. Countries with a larger number of cities implementing urban adaptation activities are the ones where central governments provide policy directives and support required for urban climate change adaptation planning and governance. There are two major flaws in the way urban climate change adaptation planning and governance is being carried out in Asian cities. First, the majority of urban climate change adaptation activities are concentrated in only one sector-disaster risk management. Second, approximately two thirds of urban climate change adaptation activities are reactive in nature. What cities in Asia need is an optimal mix of proactive and reactive adaptation. Without proactive adaptation actions, cities in Asia will not be able to address the full range of climate change hazards in strategic and cost-effective manner.

Retention, savings and interlimb transfer of reactive gait adaptations in humans following unexpected perturbations

Reactive locomotor adaptations are crucial for safe mobility, but remain relatively unexplored. Here we assess reactive gait adaptations, and their retention, savings and interlimb transfer. Using new methods to normalise walking speed and perturbation magnitude, we expose eighteen healthy adults to ten unexpected treadmill belt accelerations during walking (the first and last perturbing the right leg, the others perturbing the left leg) on two days, one month apart. Analysis of the margins of stability using kinematic data reveals that humans reactively adapt gait, improving stability and taking fewer recovery steps, and fully retain these adaptations over time. On re-exposure, retention and savings lead to further improvements in stability. Currently, the role of interlimb transfer is unclear. Our findings show that humans utilise retention and savings in reactive gait adaptations to benefit stability, but that interlimb transfer may not be exclusively responsible for improvements following perturbations to the untrained limb.

Empirical analysis of flood risk perception using historical data in Tokyo

Urban areas are vulnerable to natural disasters and require countermeasures to increase resilience. Cities located along coastal areas and rivers are increasingly facing flood problems. Urbanization in combination with climate change has increased localized torrential rainfall, causing more frequent floods in some areas. Local governments have implemented hard and soft measures to mitigate the potential impact; however, public awareness of flood risk is needed for these measures to be effective. This study exploited a characteristic of the hedonic price model and investigated changes in flood risk perception by assessing changes in land value over decades in flood-prone areas in Tokyo. The flood damage records show a decrease in flood damage in vulnerable low-lying areas, while the situation remains the same in high-lying areas. The land value of the most vulnerable area has increased more than that of less vulnerable areas. The results indicate that implementing effective measures and mitigating the impacts may diminish the awareness of flood risk, and the flood risk presented on the flood hazard map may not garner the expected attention. The findings also imply that investing in flood mitigation is worthwhile and could increase resilience in vulnerable areas. Furthermore, ensuring the precautionary acts of residents and confirming the effectiveness of reactive adaptation measures contribute to reducing future loss in the context of diminishing flood risk perception.

The implication of climate adaptation and mitigation research: capacity adaptation of rice paddy farmers to climate change

Climate change requires adjustment, resilience, anticipation, coping with stress or changes to sustainable agricultural development in socioeconomic and biophysical systems. Climate change affects the plants, livestock and also the environment, thus a reactive adaptation by paddy farmers is necessary. A purposive sampling on 30 respondents who had accomplished the Climate field school (CFS) program in “Mandiri” and group of women farmers “Dalima”. The study was conducted from October to November 2017 in Situ Gede sub-district, Bogor, Indonesia. This study used the descriptive analysis with frequency distribution table to describe the respondent distribution of each variable. The research objective is to describe the ability of farmers to adapt to climate change and to realize the sustainability of rice farming. The results obtained are the application of adaptation ability of paddy farmers to changes in rainfall patterns in the form of technical capabilities (knowledge), institutions, social capital, access to business capital is categorized medium, while the technical ability of adaptation (action) is high. Furthermore, the ability of farmers to adapt to the sustainability of socio-cultural lowland rice farming is high in assessing persistence and togetherness are important factors in farming success. The implication is that the technical adaptability of rice farmers will be high if the socio-cultural values and cooperation of rice farmers are maintained as in planning the timing of planting, harvesting and marketing.

STRATEGI ADAPTASI KEARIFAN LOKAL MASYARAKAT NELAYAN TERHADAP PERUBAHAN EKOSISTEM PESISIR ACEH

This study includes the importance of maintaining local wisdom by fishing communities in the face of adaptation to the impact of ecosystem changes on Sabang Island. Through deepening of the literature review, in-depth interviews, observations, and focus group discussions were conducted with local fishing communities in the coastal area of Sabang Island, finally found some research results that made reference to the adaptation strategies that fishermen community carried to the impact of ecosystem changes through local wisdom. The results show that Sabang Island fishermen communities who have felt the impact of ecosystem changes such as mangrove damage, coral reefs due to exploitation of coastal resources and natural disasters can achieve the success of solving the problem in several ways either through knowledge about adaptation made by fishing communities obtained from academic knowledge, or through knowledge that has been entrusted in a downward manner known as local wisdom. Therefore, fisherman adaptation strategies in addressing the impacts of ecosystem change follow a pattern of reactive adaptation, they tend to use capabilities from within the community. This adaptation pattern is carried out by developing job diversification, modifying the fleet of boats and taking action with the community in rehabilitating damaged ecosystems and the role of commander laot to the fishermen in arranging the time of catching with the natural sign through the knowledge of inheritance as local wisdom that needs to be maintained all the time. Keyword: Fisherman Society, Adaptation, ecosystem change, local wisdom.