Ecological Informatics最新文献

{"title":"Enhancing coastal bathymetric mapping with physics-informed recurrent neural networks synergizing Gaofen satellite imagery and ICESat-2 lidar data: A case in the South China Sea","authors":"Congshuang Xie , Siqi Zhang , Zhenhua Zhang , Peng Chen , Delu Pan","doi":"10.1016/j.ecoinf.2025.103121","DOIUrl":"10.1016/j.ecoinf.2025.103121","url":null,"abstract":"<div><div>Satellite-derived bathymetry (SDB) has emerged as a critical technique in response to the growing demand for large-scale coastal bathymetric mapping. However, high-resolution multispectral imagery from Gaofen satellites presents significant challenges owing to low signal-to-noise ratios (SNRs). This study aimed to enhance coastal bathymetric mapping by integrating high-resolution Gaofen satellite imagery with ICESat-2 lidar-derived bathymetry. The specific goals are to develop a novel physics-informed recurrent neural network (PI-RNN) for SDB that does not rely on prior information and assess its performance in terms of accuracy and robustness. We propose a physics-based RNN model that combines spectral and radiative transfer information from Gaofen satellite imagery with reference bathymetric data from ICESat-2. This methodology includes an adaptive ellipse density-based spatial clustering of applications with noise (AE-DBSCAN) algorithm for ICESat-2 data extraction, which surpasses standard DBSCAN in terms of accuracy. The RNN model was trained using various band combinations of Gaofen satellite data, and its performance was evaluated against in-situ measurements from Ganquan Island in the South China Sea. The physics-based RNN model achieved good bathymetric accuracy, with a coefficient of determination (R<sup>2</sup>) value >0.93 and a root mean square error (RMSE) < 0.83 m when compared to in-situ measurements on Ganquan Island, indicating the model demonstrates high robustness even under low-SNR satellite imagery conditions. In addition, the inclusion of radiative transfer information in the band combination significantly improved the training accuracy of the model, with the average RMSE being 0.2 m lower and the average R<sup>2</sup> improving by 3 % compared to results without physical information. On Huaguang Reef, the model performance further improved with R<sup>2</sup> values ranging from 0.93 to 0.97 and RMSE between 0.55 and 0.66 m after applying atmospheric correction when compared to the ICESat-2 reference bathymetric data. Without atmospheric correction, the R<sup>2</sup> of the estimated depth was in the range of 0.85 to 0.94 and RMSE in the range of 0.62 to 0.71 m, indicating that although the model mitigated some atmospheric interference effects, atmospheric correction was still necessary to achieve higher accuracy under strong atmospheric conditions. This study demonstrates that a PI-RNN can significantly enhance SDB accuracy, even under challenging conditions. The integration of active and passive remote-sensing data provides a reliable and efficient tool for large-scale coastal bathymetric mapping. The unique contribution of this study lies in the development of a novel RNN model that leverages both spectral and physical information, offering a more accurate and generalised approach to SDB.</div></div><div><h3>Plain language summary</h3><div>Traditional methods for creating these maps are limited because of ","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103121"},"PeriodicalIF":5.8,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"HawkEars: A regional, high-performance avian acoustic classifier","authors":"Jan Huus ,&nbsp;Kevin G. Kelly ,&nbsp;Erin M. Bayne ,&nbsp;Elly C. Knight","doi":"10.1016/j.ecoinf.2025.103122","DOIUrl":"10.1016/j.ecoinf.2025.103122","url":null,"abstract":"<div><div>Passive acoustic monitoring is rapidly emerging as a dominant approach for studying acoustic wildlife, with neural networks used as an increasingly common and promising approach for extracting detections of particular species from acoustic recordings. Existing options for avian classifiers include small custom models for focal species or large models that attempt to classify the entire global avian community, which suggests a possible tradeoff between classifier performance and species coverage. We argue that building domain-specific classifiers for particular geographic regions provides improved performance in exchange for reduced species coverage and present HawkEars, a regional avian classifier for Canada that includes 314 bird and 13 amphibian species. A major challenge in classifier development is the weak labeling of open access datasets. We developed a novel solution, using embedding-based search to efficiently generate strong labels. We evaluated HawkEars performance for bird species relative to two prominent avian community classifiers: BirdNET, and Perch for two datasets representing two applications: bird community surveys and studies of vocal activity rate. We found HawkEars had substantially higher performance across all metrics, detected on average two more species per recording minute in our community evaluation dataset, and had a recall of nearly twice Perch and four times BirdNET, given a precision of 0.9, for our vocal activity evaluation dataset. We suggest HawkEars provides better classification performance because a smaller species pool allows for more resources allocated per species to training and tuning and reduces the risk of class overlap, and our strong labeling method ensures high-quality training data. While our classifier, HawkEars, is a substantial improvement for practitioners studying acoustic wildlife in Canada and the northern United States, practitioners in other regions can use the HawkEars open-source code to build classifiers for other geographic regions. By continuing to improve deep-learning classification performance, HawkEars has the potential to substantially improve the efficiency and utility of passive acoustic monitoring studies.</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103122"},"PeriodicalIF":5.8,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporal dynamics of biodiversity in benthic macroinvertebrate communities from a 140-year sedimentary DNA record and their driving mechanisms","authors":"Siwei Yu ,&nbsp;Zitong Sun ,&nbsp;Rui Bian ,&nbsp;Yajun Wang ,&nbsp;Hongwei Yu ,&nbsp;Gaoqi Duan ,&nbsp;Xiaofeng Cao ,&nbsp;Weixiao Qi ,&nbsp;Jianfeng Peng ,&nbsp;Huijuan Liu ,&nbsp;Jiuhui Qu","doi":"10.1016/j.ecoinf.2025.103119","DOIUrl":"10.1016/j.ecoinf.2025.103119","url":null,"abstract":"<div><div>The ecological processes that influence the temporal components of β diversity and the interplay between taxonomic and functional β diversity are poorly understood. Therefore, the mechanisms that drive these processes and their ecological significance require further investigation. In this study, we utilized sedimentary DNA (<em>seda</em>DNA) metabarcoding to analyze an approximately 140-year-long record of the benthic macroinvertebrate communities found in Lake Chenghai, southwestern China. Our findings revealed a decrease in taxonomic and functional dissimilarity within the β diversities of these communities from 1886 to 2017, with a pronounced homogenization trend observed between 1987 and 2017. This homogenization was primarily driven by taxonomic and functional turnover, which was caused by increased nutrient levels, especially increased total nitrogen content. In addition, autogenic organic matter inputs and increased evaporation also play a significant role in this phase. Predictive models indicate that to maintain optimal water quality and ecological health, total nitrogen and total phosphorus should be controlled to within approximate ranges of 0.565 mg/L ± 0.441 mg/L and 0.026 ± 0.001 mg/L, respectively. Our study highlights the role of temporal species turnover in shaping community structures and provides valuable insights for managing lake ecosystems and preserving biodiversity within benthic macroinvertebrate communities.</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103119"},"PeriodicalIF":5.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A photogrammetric approach to the estimation of distance to animals in camera trap images","authors":"B. Mirka ,&nbsp;C.D. Lippitt ,&nbsp;G.M. Harris ,&nbsp;R. Converse ,&nbsp;M. Gurule ,&nbsp;S.E. Sesnie ,&nbsp;M.J. Butler ,&nbsp;D.R. Stewart ,&nbsp;Z. Rossman","doi":"10.1016/j.ecoinf.2025.103120","DOIUrl":"10.1016/j.ecoinf.2025.103120","url":null,"abstract":"<div><div>The ability to assess accurate distance measurements, meaning the distance from an animal to the observer, is critical for wildlife monitoring methods such as distance sampling. This process has typically been done through manual measurements or using reference points, making fieldwork and analysis labor intensive and error prone. Using Structure from Motion (SfM) photogrammetry and geotagged imagery captured from smartphones offers a simple and cost-effective solution to distance estimation from camera traps. This research evaluates the potential of SfM to create 3D models of the areas within a camera trap field-of-view to produce depth maps that can be used to automate the distance estimation process from bounding box-labeled imagery. These methods have the potential, when paired with deep learning algorithms or crowdsourcing, to automate the process of wildlife identification and distance estimation, reducing the need for manual fieldwork or analysis while increasing the precision and replicability of population estimates. To test the accuracy of these methods and evaluate best practices, three types of GNSS integration into the SfM model were assessed at three camera trap sites placed within the Sevilleta National Wildlife Refuge in New Mexico, USA. The evaluation focused on the geometric accuracy of the resulting model, quantified using Root Mean Square Error (RMSE) against known ground control points, the accuracy of distance estimates relative to field-measured distances, and the comparison of modeled distances of detected animals to ground control points. The first method used only the GNSS data embedded (geotagged) cell phone images (ImageGNSS), the second used ground control points (GCPGNSS), and the third used both GNSS sources (AllGNSS). Models created using ImageGNSS had the highest accuracy, with an overall RMSE of 1.25 pixels and a mean absolute error (MAE) of 1.76 m for distance estimation from GCPs. A comparison of the modeled distance for 10 animals to known distance points produced minimal error (MAE of 3.31 m), demonstrating the potential of photogrammetric approaches to make accurate distance estimations from camera trap imagery. Unlike other digital distance estimation techniques, error rates do not increase significantly (<em>p</em> = 0.36) at distances greater than 15 m to at least a distance of 35 m. The biggest driver of distance error was scene complexity (complex topography, dense vegetation, etc.)</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"89 ","pages":"Article 103120"},"PeriodicalIF":5.8,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of anthropogenic noise pollution as a possible chronic stressor in Antarctic Specially Protected Area N°150, Ardley Island","authors":"Maximiliano Anzibar Fialho ,&nbsp;Martín Rocamora ,&nbsp;Lucía Ziegler","doi":"10.1016/j.ecoinf.2025.103117","DOIUrl":"10.1016/j.ecoinf.2025.103117","url":null,"abstract":"<div><div>Anthropogenic noise pollution is emerging as an important environmental stressor with the potential effect of disrupting natural ecosystems, since many taxa rely on acoustic signals for social interaction and communication. Antarctic wildlife is increasingly experiencing the impact of growing human presence on the continent, especially near populated areas such as research stations. Until now, most studies on the sound impact in Antarctica have focused on marine ecosystems, with a clear paucity of studies at the level of terrestrial environments. In this study, we analyze the presence of a specific anthropogenic sound source, a power generator, in the soundscape of the Antarctic Specially Protected Area (ASPA) N°150, Ardley Island. We used Audiomoth recorders to hourly monitor the soundscape in Ardley Island and create a simple yet effective detection method based on spectral features of the source. We cross-validate the detection algorithm with human perception classification of the source presence in the recordings, obtaining a Pearson correlation coefficient of 0.61 between the two methods. Further, we relate the detection with wind velocity and direction, concluding that under certain meteorological conditions, the source can be clearly heard from Ardley. Our results suggest that the soundscape of Ardley Island is altered by the near presence of an anthropogenic noise source which could represent an impact on animal life in the ASPA. We consider this kind of study to be relevant in bringing awareness of noise pollution in Antarctic ecosystems and improving management plans in the ASPAs.</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103117"},"PeriodicalIF":5.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of the green development level and the identification of obstacles to grass-based livestock husbandry in the farming–pastoral ecotone of northern China","authors":"Dan Liu ,&nbsp;Jianjun Jin ,&nbsp;Xuan Zhang ,&nbsp;Xin Qiu ,&nbsp;Rui He ,&nbsp;Jie Yang","doi":"10.1016/j.ecoinf.2025.103112","DOIUrl":"10.1016/j.ecoinf.2025.103112","url":null,"abstract":"<div><div>The green development of livestock husbandry represents the balance between livestock production and environmental protection. In this study, a comprehensive framework and evaluation indices were developed for assessing the green development level of grass-based livestock husbandry (GDL-GLiH), including the green growth degree (GGD), green carrying capacity (GCC) and green guarantee capability (GGC). On the basis of the combined weight Technique Order Preference by Similarity to an Ideal Solution (TOPSIS) model and an analysis of obstacles, the GDL-GLiH in the farming–pastoral ecotone of northern China (FPEN) was evaluated, and the main obstacles were identified. The results indicated a general upward trend in the GDL-GLiH across the FPEN, increasing from 0.343 in 2010 to 0.416 in 2020, reflecting a growth rate of 21.138 %. Among the three dimensions, the GGC showed the most substantial increase of 95.937 %, whereas the GCC exhibited minimal growth of 1.006 %. Spatial variations were observed, with livestock-dominated systems exhibiting higher average levels (0.398) but lower growth rates (19.740 %) than crop-dominated systems (0.356; 22.252 %). Additionally, the production of milk (average obstacle degree: 12.970 %), the proportion of forage cultivation in crop cultivation (11.312 %), the total mechanical power per unit agricultural sown area (10.081 %) and the availability of purebred bovine and ovine breeding stock (9.034 %) were identified as the key obstacles. This study provides a holistic assessment framework for green livestock development and serves as a reference for formulating green development strategies in the FPEN, as well as in similar agricultural systems.</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103112"},"PeriodicalIF":5.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Toward causal artificial intelligence approach for PM2.5 interpretation: A discovery of structural causal models","authors":"Mallika Kliangkhlao ,&nbsp;Apaporn Tipsavak ,&nbsp;Thanathip Limna ,&nbsp;Racha Dejchanchaiwong ,&nbsp;Perapong Tekasakul ,&nbsp;Kirttayoth Yeranee ,&nbsp;Thanyabun Phutson ,&nbsp;Bukhoree Sahoh","doi":"10.1016/j.ecoinf.2025.103115","DOIUrl":"10.1016/j.ecoinf.2025.103115","url":null,"abstract":"<div><div>Understanding the causal mechanisms underlying PM_2.5 generation is critical for developing effective prevention strategies, necessitating an approach that goes beyond prediction and seeks deeper causal explanations to support decision-making. This study addresses these concerns through a novel causal artificial intelligence framework employing structural causal models (SCMs) to interpret PM_2.5 dynamics. The research uncovers hidden cause-and-effect relationships between meteorological factors and PM_2.5 exposure by leveraging a data-driven causal structure discovery approach, effectively representing complex data-generating processes. The proposed SCMs undergo systematic validation across two critical dimensions: demonstrating human-like intelligence understanding and achieving significant alignment with real-world observations. The PC-based SCM is particularly outstanding when compared to other algorithms like GES- and Chow-Lui-based SCMs, delivering a remarkable performance in discovering cause-and-effect relationships with an F-measure of approximately 80 % compared to the gold-standard SCM. Statistical validation provided robust evidence of the model's reliability, with fit indices—including <em>NFI</em>, <em>TLI</em>, <em>CFI</em>, <em>GFI</em>, and <em>AGFI</em>—reaching approximately 0.98 and <em>RMSEA</em> approximating 0.05. These findings demonstrate that SCM can encode human-like reasoning and naturally align with real-world meteorological systems. This method is especially effective for urban air quality monitoring, where accessible meteorological data and transparent causal relationships are essential. Its capacity to inform evidence-based policy decisions makes it a powerful tool for creating intelligent decision-support systems in PM2.5 analysis and environmental mitigation strategies.</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103115"},"PeriodicalIF":5.8,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysing the impact of large mammal herbivores on vegetation structure in Eastern African savannas combining high spatial resolution multispectral remote sensing data and field observations","authors":"Helena M. Back ,&nbsp;Isabel Pérez-Postigo ,&nbsp;Clemens Geitner ,&nbsp;Almut Arneth","doi":"10.1016/j.ecoinf.2025.103113","DOIUrl":"10.1016/j.ecoinf.2025.103113","url":null,"abstract":"<div><div>It is well understood, that grazing and browsing in the African savanna ecosystem modulates tree-grass ratios. However, many of the large mammals are under pressure due to land use and climate change. It is challenging to predict how their altered abundance or range shifts will interact with savanna structure. Herbivore exclusion experiments can help to better understand the impacts of herbivores of different sizes on vegetation structure and composition, including interactions with rainfall. Here, we combine field data of the Ungulate Herbivory Under Rainfall Uncertainty (UHURU) exclusion experiment and high spatial resolution satellite images of the PlanetScope and Sentinel-2 series to investigate the impacts of herbivores on vegetation structure in a Kenyan savanna. Field data as well as NDVI values derived from Sentinel-2 and NDVI contrast values of PlanetScope show that presence of herbivores lowers vegetation cover and modify the woody vegetation structure depending on which herbivores are present. The vegetation grew tallest when mega-sized herbivores were absent but meso-sized and small herbivores were present, which resulted in high NDVI contrast values. The absence of herbivores resulted in fewer bare ground patches and increased green biomass, such as a higher mean canopy width, which led to higher NDVI values. Few studies have explored the potential of passive remote sensing data to assess herbivory impacts beyond the plot scale and over longer time-periods; however, these previous studies solely focused on the NDVI. Here we demonstrate the added value of also using GLCM texture measures to investigate effects on a savanna ecosystem in response to presence or absence of herbivores. Combining these data with plot measurements our study demonstrates the benefits of combining field and space perspectives in ecosystem studies<em>.</em></div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103113"},"PeriodicalIF":5.8,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143687623","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seasonal and inter-annual dynamics of a Macrocystis pyrifera forest in Concepcion Bay, Chile","authors":"Daniel Gonzalez-Aragon ,&nbsp;Richard Muñoz ,&nbsp;Henry Houskeeper ,&nbsp;Kyle Cavanaugh ,&nbsp;Wirmer García-Tuñon ,&nbsp;Laura Farías ,&nbsp;Carlos Lara ,&nbsp;Bernardo R. Broitman","doi":"10.1016/j.ecoinf.2025.103103","DOIUrl":"10.1016/j.ecoinf.2025.103103","url":null,"abstract":"<div><div>Kelp forest are foundation species that deliver key ecosystem services for coastal habitats. Chile is one of the largest exporters of kelp biomass, which relies on the harvesting of wild populations. The vast and rugged coastline of Chile hinders field-based studies of the seasonal and spatial dynamics of kelp biomass, yet remote sensing approaches can provide an effective tool to study temporal patterns of kelp distribution and biomass. Our study aimed to establish the basic patterns of variation in the surface area and biomass of a <em>Macrocystis pyrifera</em> forest off Concepcion Bay, Central Chile. Using archival data from the Landsat series we constructed a long-term series of annual kelp canopy cover and assessed patterns of interannual, and a seasonal variation with the more recent Sentinel 2 data using Google Earth Engine. We validated satellite observations of the kelp forest in the field by recording local temperature and nutrient concentrations and through a sample of blades and stipes, which we used to estimate whole-individual <em>in situ</em> biomass through allometric relationships. Finally, we related decadal to interannual changes in canopy cover to local and regional drivers using data from public repositories. Our 24-year annual time series revealed large year-to-year variability in kelp forest area that did not show a significant association with different El Niño-Southern Oscillation indices, but the deviance explained increased notably with a 1-year lag. The seasonal time series exhibited clear seasonal patterns with cover peaking during summer. We found a significant influence of local environmental variables such as temperature, wave height, nitrate concentration, and solar radiation on kelp forest area. Furthermore, blade counts appeared as the most reliable metric for estimating <em>M. pyrifera</em> biomass. Interestingly, we found no evidence of temperature or nutrient stress during the summer biomass peak, hence seasonal variation in <em>M. pyrifera</em> abundance appears to be primarily influenced by solar radiation and wave activity in our study population. Our results provide a basis to derive seasonal time series across Chile’s kelp forests and suggest that understanding local stressors is key to ensure harvesting practices that promote the sustainable management of these key habitats. As ongoing climate change and overexploitation threaten kelp forest habitats, remote sensing emerges as a promising tool for the monitoring and management of extensive and remote coastlines.</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103103"},"PeriodicalIF":5.8,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coral reef detection using ICESat-2 and machine learning","authors":"Gabrielle A. Trudeau ,&nbsp;Kim Lowell ,&nbsp;Jennifer A. Dijkstra","doi":"10.1016/j.ecoinf.2025.103099","DOIUrl":"10.1016/j.ecoinf.2025.103099","url":null,"abstract":"<div><div>As anthropogenic impacts threaten natural habitats, effective monitoring strategies are crucial. Coral reefs, among the most vulnerable ecosystems, traditionally employ monitoring techniques that are labor-intensive and costly, prompting the exploration of remote sensing as a cost-effective alternative. Launched in October 2018, the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) provides high-resolution, high-frequency data, with its green laser offering unprecedented opportunities for bathymetric and coral reef applications. This study investigates the use of ICESat-2 data for atoll coral reef detection, utilizing Heron Island in the Great Barrier Reef, AU, and employing machine learning models. A binary logistic regression (BLR) model and convolutional neural network (CNN) were tested for determining coral reef presence, with the CNN outperforming the BLR in accuracy (85.4%), F1 score (43%), and false positive rate (13.1%). A challenge of the study included the difficulty of balancing false positive rates in predictive models to avoid over- or underestimations of reef extent. These obstacles were mitigated through the integration of algorithmically derived pseudo-rugosity and slope metrics as innovative proxies for seafloor complexity, significantly improving predictive performance. Feature importance analysis identified satellite-derived bathymetry (SDB) depth as the most critical predictor of coral presence, followed by pseudo-rugosity, slope, and various other depth measurements. This research establishes a new application of ICESat-2 data combined with advanced machine learning techniques as a promising method for efficient and cost-effective coral reef monitoring. Future work should refine algorithms and incorporate additional environmental variables to improve model performance across various reef types.</div></div>","PeriodicalId":51024,"journal":{"name":"Ecological Informatics","volume":"87 ","pages":"Article 103099"},"PeriodicalIF":5.8,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143680203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}