scholarly journals Age-related variations in  13C of ecosystem respiration across a coniferous forest chronosequence in the Pacific Northwest

2002 ◽  
Vol 22 (2-3) ◽  
pp. 159-167 ◽  
Author(s):  
J. E. Fessenden ◽  
J. R. Ehleringer
Author(s):  
Frederick J. Swanson

The H. J. Andrews Experimental Forest Long-Term Ecological Research (LTER) program has nurtured a large, highly interdisciplinary community that has been a wonderful seedbed for emergence of ideas from our group, and for my own growth as a scientist, educator, collaborator, and communicator. Collaborations for me as an individual and within the Andrews forest group have grown over the decades: research–land management since the 1950s, ecology–earth sciences since the early 1970s, biophysical sciences–social sciences since the early 1990s, and humanities–arts–sciences over the past dozen years. As a US Forest Service scientist in seamless collaboration with academic and land manager colleagues, the stable yet dynamic community that the LTER program fosters has served as a great platform for connecting science lessons with society through many means, ranging from development of regional conservation strategies and landscape management plans to storytelling. This is a practice of citizenship by individual scientists and by a science-based team. The sustained learning that the LTER program has underwritten gives scientists a foundation for communicating findings from science and discussing their implications with the public, and the forest itself is a great stage for these conversations. I have had a career of immersion in the International Biological Program (IBP) and in the LTER program since its inception. After completing graduate studies in geology in 1972, I had the good fortune to join the early stages of IBP in the Coniferous Forest Biome Project at the H. J. Andrews Experimental Forest (AND) in the Cascade Range of Oregon. Our team of forest and stream ecologists, and a few earth scientists, had the decade of the 1970s to coalesce, mature, and craft stories of the ecosystems of the Pacific Northwest. The Andrews forest was a wonderful place to do that. It has a complex, ancient forest with nearly 100-m tall trees and fast, cold, clear, mountain streams whose beauty and chill takes your breath away. The year 1980 was pivotal for the group in three ways. First, Jerry Franklin led a synthesis of our team’s knowledge of old-growth forests, which set the stage for major transformation in public perception and policy toward federal forests a decade later and, incidentally, changed our lives.


2019 ◽  
Vol 14 (7) ◽  
pp. 074029 ◽  
Author(s):  
Yueyang Jiang ◽  
Christopher J Still ◽  
Bharat Rastogi ◽  
Gerald F M Page ◽  
Sonia Wharton ◽  
...  

1950 ◽  
Vol 82 (2) ◽  
pp. 25-33 ◽  
Author(s):  
D. F. Hardwick

A recent study of that complex of the genus Diarsia which at present is found in collections under the name rosaria Grt. has convinced me that at least two species, easily separable on the basis of maculation and colouring, have gone under this name. One of these, the true rosaria, is confined to the more northerly portions of the California coast. The other species ranges from Alaska south through British Columbia into the Pacific Northwest of the United States, and from the coast of British Columbia east through the northern coniferous forest zone to the coast of Labrador. The latter species is divisible on the basis of well defined genitalic differences into a subspecies inhabiting the Cordilleran region and a subspecies confined to the northern coniferous forest.


Author(s):  
Peter Mitchell

This chapter looks at three more regions of North America: the Columbia Plateau and adjacent areas of the Pacific Northwest Coast; the Great Basin; and California. It also focuses on three main themes: the development of new identities as many groups adapted aspects of the lifestyle and customs of those on the Plains and more coherent tribal entities emerged; raiding for captives; and raiding for horses. A fourth topic, which casts these into relief, is why some groups rejected the horse, or chose to adopt it very late in their history. The Great Basin was the first of the three areas to receive the horse. It is an arid region of desert, salt lakes, and mountains where rainfall is unpredictable and low, but increases eastward (Plate 15). Except for the Colorado along its southern edge and the headwaters in the rockies of streams draining towards the Missouri, none of its rivers reach the sea. Fremont farmers had once made a living across Utah, but by the 1600s cultivation was restricted to a few groups in the south and west. Elsewhere, the Basin’s inhabitants depended entirely on hunting and gathering, though strategies like burning enhanced the productivity of wild plants and game. Very broadly, two subsistence patterns were followed: one emphasized fish and waterfowl around wetlands, the other a more mobile, broadly based foraging economy in deserts and mountains in which pine nuts (piñons), grass seeds, rabbits, and larger game were important. Except for the Washoe near Lake Tahoe in eastern California, all the region’s historic inhabitants spoke Numic languages. Major groups included Utes in the southeast, Shoshones in the north and centre, and Paiutes in the west and southwest. To the north of the Great Basin lies the Plateau, centred on the Columbia River and its tributaries, which collectively send their waters into the Pacific Ocean (Plate 16). Coniferous forest covers its northern and eastern parts (including several ranges running parallel to but west of the Rockies), but the drier, hilly country of Oregon and eastern Washington is more steppe-like, with sagebrush common and trees more localized.


2019 ◽  
Vol 39 (4) ◽  
pp. 452
Author(s):  
Margaret H. Massie ◽  
Todd M. Wilson ◽  
Anita T. Morzillo ◽  
Emilie B. Henderson

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