Open-Source Analysis of Submerged Aquatic Vegetation Cover in Complex Waters Using High-Resolution Satellite Remote Sensing: An Adaptable Framework DOI Creative Commons
Arthur de Grandpré, Christophe Kinnard, Andrea Bertolo

et al.

Remote Sensing, Journal Year: 2022, Volume and Issue: 14(2), P. 267 - 267

Published: Jan. 7, 2022

Despite being recognized as a key component of shallow-water ecosystems, submerged aquatic vegetation (SAV) remains difficult to monitor over large spatial scales. Because SAV’s structuring capabilities, high-resolution monitoring landscapes could generate highly valuable ecological data. Until now, remote sensing SAV has been largely limited applications within costly image analysis software. In this paper, we propose an example adaptable open-sourced object-based (OBIA) workflow cover maps in complex environments. Using the R software, QGIS and Orfeo Toolbox, apply radiometric calibration, atmospheric correction, de-striping hierarchical iterative OBIA random forest classification based on raw DigitalGlobe multispectral imagery. The is applied images taken two spatially fluvial lakes Quebec, Canada, using Quickbird-02 Worldview-03 satellites. Classification performance training sets reveals conservative estimates with less than 10% error across all classes except for lower growth forms most turbid waters. light these results, conclude that it possible distribution environment flexible functional workflow.

Language: Английский

Evasion of tipping in complex systems through spatial pattern formation DOI
Max Rietkerk, Robbin Bastiaansen, Swarnendu Banerjee

et al.

Science, Journal Year: 2021, Volume and Issue: 374(6564)

Published: Oct. 8, 2021

Resilience to tipping points in ecosystems Spatial pattern formation has been proposed as an early warning signal for dangerous and imminent critical transitions complex systems, including ecosystems. Rietkerk et al . review how Earth system components can actually evade catastrophic through various pathways of spatial formation. With mathematical real-world examples, they argue that evading enhancing resilience could be relevant many until now were known prone. Many these systems may more resilient than currently thought because overlooked dynamics multiple stable states, thus not undergo or with global change. —AMS

Language: Английский

Citations

205
Impacts of climate change on vegetation pattern: Mathematical modeling and data analysis DOI
Gui‐Quan Sun, Li Li, Jing Li

et al.

Physics of Life Reviews, Journal Year: 2022, Volume and Issue: 43, P. 239 - 270

Published: Oct. 25, 2022

Language: Английский

Citations

65
Conserving seagrass ecosystems to meet global biodiversity and climate goals DOI
Carlos M. Duarte, Eugenia T. Apostolaki, Óscar Serrano

et al.

Published: Feb. 28, 2025

Language: Английский

Citations

1
Fairy circles reveal the resilience of self-organized salt marshes DOI Creative Commons

Lixia Zhao,

Kang Zhang,

Koen Siteur

et al.

Science Advances, Journal Year: 2021, Volume and Issue: 7(6)

Published: Feb. 5, 2021

Self-organized fairy circles reveal the resilience of emerging salt marsh ecosystems.

Language: Английский

Citations

55
Phase-separation physics underlies new theory for the resilience of patchy ecosystems DOI Creative Commons

Koen Siteur,

Quan‐Xing Liu, Vivi Rottschäfer

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(2)

Published: Jan. 3, 2023

Spatial self-organization of ecosystems into large-scale (from micron to meters) patterns is an important phenomenon in ecology, enabling organisms cope with harsh environmental conditions and buffering ecosystem degradation. Scale-dependent feedbacks provide the predominant conceptual framework for self-organized spatial patterns, explaining regular observed in, e.g., arid or mussel beds. Here, we highlight alternative mechanism based on aggregation a biotic abiotic species, such as herbivores, sediment, nutrients. Using generalized mathematical model, demonstrate that aggregation-driven have fundamentally different dynamics resilience properties than formed through scale-dependent feedbacks. Building physics theory phase-separation dynamics, show patchy are more vulnerable systems feedbacks, especially at small scales. This because local disturbances can trigger redistribution resources, amplifying Finally, insights from physics, by providing mechanistic understanding initiation their tendency coarsen, new indicator signal proximity ecological tipping points subsequent degradation this class ecosystems.

Language: Английский

Citations

22
Invasive Macrophytes Control the Spatial and Temporal Patterns of Temperature and Dissolved Oxygen in a Shallow Lake: A Proposed Feedback Mechanism of Macrophyte Loss DOI Creative Commons
María P. Vilas, Clelia L. Marti, Matthew Adams

et al.

Frontiers in Plant Science, Journal Year: 2017, Volume and Issue: 8

Published: Dec. 7, 2017

Submerged macrophytes can have a profound effect on shallow lake ecosystems through their ability to modify the thermal structure and dissolved oxygen levels within lake. Invasive macrophytes, in particular, grow rapidly induce gradients lakes that may substantially change ecosystem challenge survival of aquatic organisms. We performed fine-scale measurements 3D numerical modeling at high spatiotemporal resolution assess seasonal growth Potamogeton crispus L. spatial temporal dynamics temperature urban (Lake Monger, Perth, WA, Australia). Daytime stratification developed during growing season was clearly observed throughout macrophyte bed. At all times measured, stronger center bed compared edges. By fitting logistic curve changes plant height over time (r2 = 0.98), comparing this data bed, we found began once occupied least 50% water depth. This conclusion strongly supported by hydrodynamic model fitted weekly profiles measured four periods > 0.78 times). As increased developed, concentration changed from vertically homogeneous oxic conditions both day night expression night-time anoxic close sediments. Spatially interpolated maps results indicated plants also reduced horizontal exchange with surrounding unvegetated areas, preventing flushing low out Simultaneously, aerial imagery showed central dieback occurring toward end season. Thus, hypothesized stratification-induced anoxia lead accelerated P. region, causing formation ring-shaped pattern distribution. Overall, our study demonstrates submerged alter characteristics thus create challenging for maximizing coverage.

Language: Английский

Citations

60
Spatial patterns in ecological systems: from microbial colonies to landscapes DOI
Ricardo Martínez‐García, Corina E. Tarnita, Juan A. Bonachela

et al.

Emerging Topics in Life Sciences, Journal Year: 2022, Volume and Issue: 6(3), P. 245 - 258

Published: June 9, 2022

Self-organized spatial patterns are ubiquitous in ecological systems and allow populations to adopt non-trivial distributions starting from disordered configurations. These form due diverse nonlinear interactions among organisms between their environment, lead the emergence of new (eco)system-level properties unique self-organized systems. Such pattern consequences include higher resilience resistance environmental changes, abrupt ecosystem collapse, hysteresis loops, reversal competitive exclusion. Here, we review exhibiting patterns. We establish two broad categories depending on whether self-organizing process is primarily driven by density-dependent demographic rates or movement. Using this organization, examine a wide range observational scales, microbial colonies whole ecosystems, discuss mechanisms hypothesized underlie observed system-level consequences. For each example, both empirical evidence existing theoretical frameworks developed identify causes patterning. Finally, trace qualitative similarities across propose possible ways developing more quantitative understanding how self-organization operates scales ecology.

Language: Английский

Citations

24
Vegetation pattern formation: The mechanisms behind the forms DOI
E. Meroni

Physics Today, Journal Year: 2019, Volume and Issue: 72(11), P. 30 - 36

Published: Nov. 1, 2019

A simple principle relating growth to lateral water transport explains the variety of self-organized vegetation patchiness.

Language: Английский

Citations

40
Belowground feedbacks as drivers of spatial self-organization and community assembly DOI Creative Commons

Inderjit Inderjit,

Ragan M. Callaway, E. Meroni

et al.

Physics of Life Reviews, Journal Year: 2021, Volume and Issue: 38, P. 1 - 24

Published: July 16, 2021

Language: Английский

Citations

32
Definition of “fairy circles” and how they differ from other common vegetation gaps and plant rings DOI Creative Commons
Stephan Getzin, Hezi Yizhaq, Wälter R. Tschinkel

et al.

Journal of Vegetation Science, Journal Year: 2021, Volume and Issue: 32(6)

Published: Nov. 1, 2021

Abstract Aims The fairy circles along the Namib Desert in southern Africa are round grassland gaps that have puzzled scientists for about 50 years. With discovery of Australia 2016, debate on origin has been extended to a new continent. Research interest topic since then risen strongly but so use term “fairy circle”. This become more imprecise and, by analogy, applied circular vegetation or plant rings largely unrelated circles. For this reason, we define concept identifying their three main characteristics based situ field observations and soil excavations larger‐scale spatial patterns, regional‐scale distribution. Results Following approach, defined by: (a) being “empty gaps” without central insect‐nest structure; (b) ability form spatially periodic which regular hexagonal patterns with an extraordinary degree ordering; (c) regional distribution confined within narrow arid climatic envelope. In these combined traits, differ from other common which, example, always structure may occur across broad gradients continents. Also own specific attributes genuine Conclusions There many vegetation‐gap lands if such cannot jointly show defining circles, they should be carefully discussed own, rather than mixing them up Our synthesis provides etymology different types rings, aiming guide reader through various classes patterns.

Language: Английский

Citations

28