Abstract
Floodplains pose challenges to managers of conservation lands because of constantly changing interactions with their rivers. Although scientific knowledge and understanding of the dynamics and drivers of river-floodplain systems can provide guidance to floodplain managers, the scientific process often occurs in isolation from management. Further, communication barriers between scientists and managers can be obstacles to appropriate application of scientific knowledge. With the coproduction of science in mind, our objectives were the following: (1) to document management priorities of floodplain conservation lands, and (2) identify science needs required to better manage the identified management priorities under nonstationary conditions, i.e., climate change, through stakeholder queries and interactions. We conducted an online survey with 80 resource managers of floodplain conservation lands along the Upper and Middle Mississippi River and Lower Missouri River, USA, to evaluate management priority, management intensity, and available scientific information for management objectives and conservation targets. Management objectives with the least information available relative to priority included controlling invasive species, maintaining respectful relationships with neighbors, and managing native, nongame species. Conservation targets with the least information available to manage relative to management priority included pollinators, marsh birds, reptiles, and shore birds. A follow-up workshop and survey focused on clarifying science needs to achieve management objectives under nonstationary conditions. Managers agreed that metrics of inundation, including depth and extent of inundation, and frequency, duration, and timing of inundation would be the most useful metrics for management of floodplain conservation lands with multiple objectives. This assessment provides guidance for developing relevant and accessible science products to inform management of highly dynamic floodplain environments. Although the problems facing managers of these lands are complex, products focused on a small suite of inundation metrics were determined to be the most useful to guide the decision making process.
Highlights
Floodplains owe their high biodiversity and productivity to dynamic spatial and temporal interactions with the adjacent river (Bayley 1995, Tockner et al 2000, Tockner and Stanford 2002)
We conducted an online survey with 80 resource managers of floodplain conservation lands along the Upper and Middle Mississippi River and Lower Missouri River, USA, to evaluate management priority, management intensity, and available scientific information for management objectives and conservation targets
Study area The project focused on floodplain conservation lands along the Upper Mississippi River (UMR), the Middle Mississippi River (MMR), and the Lower Missouri River (LMOR), USA (Fig. 1)
Summary
Floodplains owe their high biodiversity and productivity to dynamic spatial and temporal interactions with the adjacent river (Bayley 1995, Tockner et al 2000, Tockner and Stanford 2002). Extreme floods on the large rivers have prompted reconsideration of the role of floodplains in regulating flooding processes, mitigating flood damages, and providing conservation values (Sparks 1995). Within the state of Missouri USA, for example, approximately 35,000 hectares of floodplain lands have been acquired by state and federal agencies along the Missouri and Mississippi rivers, and additional lands are under various conservation easements (USGS, unpublished data). The majority of these properties have been converted from agricultural production to natural land cover and managed for conservation
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