Browsing by Author "Hilderbrand, Robert H."

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Altered Ecological Flows Blur Boundaries in Urbanizing Watersheds
(2009) Lookingbill, Todd R.; Kaushal, Sujay S.; Elmore, Andrew J.; Gardner, Robert; Eshleman, Keith N.; Hilderbrand, Robert H.; Morgan, Raymond P.; Boynton, Walter R.; Palmer, Margaret A.; Dennison, William C.
"The relevance of the boundary concept to ecological processes has been recently questioned. Humans in the post-industrial era have created novel lateral transport fluxes that have not been sufficiently considered in watershed studies. We describe patterns of land-use change within the Potomac River basin and demonstrate how these changes have blurred traditional ecosystem boundaries by increasing the movement of people, materials, and energy into and within the basin. We argue that this expansion of ecological commerce requires new science, monitoring, and management strategies focused on large rivers and suggest that traditional geopolitical and economic boundaries for environmental decision making be appropriately revised. Effective mitigation of the consequences of blurred boundaries will benefit from a broad-scale, interdisciplinary framework that can track and explicitly account for ecological fluxes of water, energy, materials, and organisms across human-dominated landscapes."
The Myths of Restoration Ecology
(2005) Hilderbrand, Robert H.; Watts, Adam C.; Randle, April M.
From introduction: "Based on our experiences as researchers and practitioners in conservation and restoration ecology, we propose five central myths (Table 1) under which many ecological restoration and management projects seem to be conceived and implemented. Myths have value because they help us to organize and understand complex systems and phenomena. Identifying myths can help make the tacit explicit by revealing assumptions that are otherwise hidden. However, they remain simplified and potentially misguided models for understanding and application. The first Myth, the Carbon Copy, addresses the goal-setting process, and as such, it forms the basis of how restorations are evaluated. The Carbon Copy is closely tied to the remaining four myths, which involve the process of restoration and management: the Field of Dreams; Fast Forwarding; the Cookbook; and Command and Control: the Sisyphus Complex. We believe that describing these myths will be useful in understanding how some management or restoration strategies are conceived, designed, and implemented. For example, adherence to different myths may direct actions in divergent directions, as could be the case when choosing between a focus on ecosystem structure (Carbon Copy) or on key processes (Field of Dreams). Examining these myths may also help us better understand why some restoration projects do not meet our expectations. In the pages below, we briefly describe each myth and its assumptions, and give examples where the myth exists. "Our objective is not to abandon what we propose to be prevalent myths in ecological restoration--there are elements of truth in each--but to recognize that there are tacit assumptions associated with each myth. Failure to recognize these assumptions can lead to conflict and disappointing results despite large expenditures of time and effort. Our challenge is to recognize the limitations and not accept sometimes dogmatic beliefs without critical examination. We do not claim that every project is rooted in myth, but suggest that many perceived failures may be traced to over-reliance on one or more of the myths. We do not condemn restoration ecology, but rather provide a means of self-examination so readers can identify from their own experiences what worked and possible reasons for perceived failures."