Role of a lake-wide prey fish survey in understanding ecosystem dynamics and managing fisheries of Lake Michigan

AbstractScholars and practitioners continue to recognize the crucial role of entrepreneurial ecosystems (EEs) in creating a conducive environment for productive entrepreneurship. Although EEs are fundamentally interaction systems of hierarchically independent yet mutually dependent actors, few studies have investigated how interactions among ecosystem actors drive the entrepreneurial process. Seeking to address this gap, this paper explores how ecosystem actor interactions influence new ventures in the financial technology (fintech) EE of Singapore. Guided by an EE framework and the use of an exploratory-abductive approach, empirical data from semi-structured interviews is collected and analyzed. The findings reveal four categories representing both the relational perspective, which features interaction and intermediation dynamics, and the cultural perspective, which encompasses ecosystem development and regulatory dynamics. These categories help explain how and why opportunity identification and resource exploitation are accelerated or inhibited for entrepreneurs in fintech EEs. The present study provides valuable contributions to scholars and practitioners interested in EEs and contributes to the academic understanding of the emerging fintech phenomenon.

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AN OIL SPILL MODEL SYSTEM FOR ARCTIC WATERS

International Oil Spill Conference Proceedings ◽

10.7901/2169-3358-1989-1-517 ◽

1989 ◽

Vol 1989 (1) ◽

pp. 517-523

Author(s):

Malcolm Spaulding ◽

Tatsusaburo Isaji ◽

Katherine Jayko

Keyword(s):

Oil Spill ◽

Sensitivity Study ◽

Model System ◽

Ecosystem Dynamics ◽

Environmental Data ◽

Trajectory Data ◽

Duration Distribution ◽

Coastal Sea ◽

Model Components

ABSTRACT An Arctic coastal sea model system, consisting of submodels for weather, hydrodynamics, waves, suspended sediment, ice cover, oil spill trajectory and fates, and ecosystem dynamics is presented. The structure and operation of each sub-model and linkages among the various model components are briefly described. The weather, hydrodynamic, ice, and oil spill fates components of the model system are applied to predict hydrodynamics and oil spill trajectories from selected release points in the Bering Sea. Trajectory data are analyzed to describe the percent of trajectories affecting land and the direction, length, and duration distribution of trajectories. A detailed sensitivity study is performed to determine the role of the various mean current components and wind drift effects in describing spill trajectories. Model predictions highlight the importance of accurately representing the environmental data used as input to the model.

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THE ROLE OF EPHEMERAL STRATIFICATION, ANOXIA, AND ENTRAINMENT IN MEDIATING SPATIOTEMPORAL TROPHIC STATE DYNAMICS IN A LAKE MICHIGAN DROWNED RIVER MOUTH SYSTEM (MONA LAKE, MI)

10.37099/mtu.dc.etdr/802 ◽

2019 ◽

Author(s):

Hayden Henderson

Keyword(s):

Trophic State ◽

Lake Michigan ◽

River Mouth

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Food Webs as Complex Adaptive Systems

Food Webs (MPB-50) ◽

10.23943/princeton/9780691134178.003.0012 ◽

2011 ◽

Author(s):

Kevin S. McCann

Keyword(s):

Food Webs ◽

Complex Adaptive Systems ◽

Adaptive Systems ◽

Lake Trout ◽

Human Impacts ◽

Interaction Strength ◽

Ecosystem Dynamics ◽

Ecosystem Size ◽

Complex Adaptive

This chapter examines some of the potential empirical signatures of instability in complex adaptive food webs. It first considers the role of adaptive behavior on food web topology, ecosystem size, and interaction strength before discussing the implications of this behavior for ecosystem dynamics and stability. It then analyzes the results of empirical investigations of Canadian Shield lake trout food webs and how human influences and ecosystems coupled in space may drive biomass pyramids, potentially leading to species loss. It also explores the tendency of subsidies, through human impacts, to homogenize natural ecosytems and concludes by assessing some of the changing conditions that are being driven by humans and how these may change ecosystems.

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“Who Has the Power to Adapt?” Frameworks for Resilient Agriculture Must Contend With the Power Dynamics of Land Tenure

Frontiers in Sustainable Food Systems ◽

10.3389/fsufs.2020.555270 ◽

2020 ◽

Vol 4 ◽

Author(s):

Adam Calo

Keyword(s):

Adaptive Capacity ◽

Land Tenure ◽

Food Systems ◽

Food System ◽

Farming Systems ◽

Ecosystem Dynamics ◽

Agrarian Change ◽

Resilience Thinking ◽

Capacity Formulation

This special issue aims to develop how Diversified Farming Systems (DFS) may contribute to adaptive capacity in order to confer resilience to agricultural systems. In this perspective article, I argue that a framework for DFS and adaptive capacity must adequately contend with the role of farmland tenure on the shape of food systems to be both internally coherent and socially redistributive. Yet, both DFS and adaptive capacity scholarship deemphasize or mischaracterize the role of farmland tenure in favor of ecosystem dynamics. In this paper, I bring together lessons from the agrarian change literature and established critiques of resilience thinking to demonstrate core problems with a framework aimed at linking DFS to adaptive capacity without adequately addressing the role of farmland tenure. Namely, applying resilience thinking as a framework to understand food systems change prioritizes concern over final “states” or processes of farming systems and may ignore who has the power to adapt or who derives benefits from adaptation. The critiques of resilience thinking inform that the result of this apolitical elision is (1) entrenchment of neoliberal logics that place responsibility to cultivate adaptation on individual farmers and (2) provisioning of legitimacy for land tenure systems that can most readily adopt DFS, without understanding how well these systems distribute public benefits. Resilience reformers call for ways to include more power aware analysis when applying resilience thinking to complex socio-technical systems. I suggest that centering the role of land tenure into the frameworks of DFS and adaptive capacity provides a lens to observe the power relations that mediate any benefits of agricultural diversification. Integrating analysis of the social and legal structures of the food system into the DFS for adaptive capacity formulation is a crucial step to transforming resilience thinking from an apolitical tool to transformative and power-aware applied science.

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