Joshua Latterell

King County · Department of Natural Resources and Parks (DNRP)

The upstream extent of coastal cutthroat (Oncorhynchus clarki clarki) and rainbow (Oncorhynchus mykiss) trout distribution in logged and unlogged streams of the western Cascade Mountains appears to be primarily constrained by steep channel gradient and sparse pool habitat. Narrow or intermittent wetted channels are also important constraints in log...

Floodplains in the Pacific Coastal Ecoregion (PCE) stem from steep eroding mountain landscapes in a rain forest environment, and sustain a rich array of natural resources. Like floodplains elsewhere, many of the approximately 200 coastal river valleys are profoundly altered by flow regulation and land conversion for agriculture and urban developmen...

We illustrate the fundamental importance of fluctuations in natural water flows to the long-term sustainability and productivity of riverine ecosystems and their riparian areas. Natural flows are characterized by temporal and spatial heterogeneity in the magnitude, frequency, duration, timing, rate of change, and predictability of discharge. These...

Large logs, important agents of biophysical heterogeneity in temperate floodplain rivers, have been virtually eliminated from modified systems. Our purpose was to quantify the sources and dynamics of large logs (> or = 1 m diameter) in the mainstem of a nearly pristine system: the Queets River, Washington, USA. Erosion of forests by the river suppl...

The Sabie River, located within the semi-arid savanna of South Africa, experienced a ∼100-year return interval flood in 2000, providing a rare opportunity to quantify the resultant pattern and consequence of woody debris piles for riparian areas. Biophysical attributes of rivers in arid and semi-arid regions differ strongly from those in mesic regi...

A vegetation chronosequence spanning over 300 years was established in unconstrained reaches of the lower Queets River in Olympic National Park, Washington, USA, for an examination of riparian successional patterns. The Queets is an unconstrained, dynamic, mountain river located within a temperate rain forest environment. Ongoing chan- nel movement...

1. River valleys resemble dynamic mosaics, composed of patches which are natural, transient features of the land surface produced by the joint action of a river and successional processes over years to centuries. They simultaneously regulate and reflect the distribution of stream energy and exchanges of sediment, wood and particulate organic matter...

The Clean Water Act (CWA) by the U.S. congress, insisted that the first priority, relative to point-source regulation, be the development and imposition of technology-based effluent guidelines. These point source effluent guidelines resulted in measurable reduction in pollutant loading, in contrast to uncertainty associated with river restoration p...

A set of eight simple ecological and social principles is proposed that could enhance the understanding of what constitutes fish ‘habitat’ and, if implemented, could contribute to improved management and conservation strategies. The habitat principles are a small, interrelated sub-set that may be coupled with additional ones to formulate comprehens...

Large wood shapes the geomorphology and ecology of rivers. We determined the origin, distribution, and fate of large wood in two rivers from contrasting environments. The Queets is an unstable temperate, rainforest river running from the Olympic Mountains (USA) through a glacial valley with colossal trees. In most years, the channel erodes a variet...

Riparian systems epitomize heterogeneity. As transitional semiterrestrial areas influenced by water, they usually extend from the edges of water bodies to the edges of upland terraces. Riparian systems often exhibit strong biophysical gradients, which control energy and elemental fluxes, and are highly variable in time and space.These attributes co...

Thesis (Ph. D.)--University of Washington, 2005. This study quantified the natural history and dynamics of wood over six decades in the Queets River, Washington; a near-pristine floodplain system in a temperate rainforest. Wood abundance, characteristics, and origins were quantified for mainstem and tributary channels. A process-based budgeting app...

Large woody debris (LWD: > 10 cm diameter and > 1 m in length) in stream channels of forested regions in North America is an essential ecosystem component. This article summarizes information from the literature on the spatial and temporal variability of LWD abundance, distribution and age; the processes of LWD delivery and elimination; and the inf...

High snowmelt runoff flows are reported to reduce trout recruitment in Rocky Mountain streams, but biotic interactions from older trout may also limit fry abundance. We tested these relationships for fall-spawning brook trout (Salvelinus fontinalis) and brown trout (Salmo trutta) in six small Colorado streams by relating magnitude, duration, and fr...