Freshwater | Terrestrial | Economics | Publications & Reports

Market-Based Mechanisms For Securing Environmental Water In California

Sarah Heard, Siobhan King, Eric Hallstein

California’s water supply is becoming increasingly unreliable. During dry times, consumptive use often outstrips supplies. As a result, people and nature suffer. This imbalance of supply and demand will likely grow worse if future demand for agricultural and urban water increases alongside a warming climate. Market-based tools offer a promising approach to sustainably and responsibly managing California’s water resources. This report evaluates eleven market-based mechanisms that seek to achieve sustainable water use in an efficient, equitable and transparent manner. The mechanisms—that seek to develop new supply, reduce water demand and re-operate existing water supply systems—were evaluated based on potential conservation impact, likelihood of implementation and associated risk.

2020 | Freshwater | Terrestrial | Technology | Science | Maps & Webmaps

Planting Stormwater Solutions

Brian Cohen, Kelsey Jessup, Sophie Parker, John Randall, Jill Sourial

Cities across Southern California are investing in new infrastructure to address the challenges of stormwater management. We promote the use of nature-based solutions to ensure projects both treat stormwater and yield multiple additional benefits. TNC’s spatial analyses, summarized in this poster, help prioritize where to site…


2020 | Freshwater | Science | Publications & Reports

Groundwater Thresholds for Ecosystems: A Guide for Practitioners

Melissa M. Rohde, Laurel Saito, Ryan Smith

In addition to benefiting humans, groundwater is a critical water supply to many ecosystems, providing a buffer during dry periods and critical habitat for rare and endemic species. Increasing groundwater use to meet human water demands can outcompete these ecosystem water needs, causing irreversible damage to…


2020 | Terrestrial | Technology | Publications & Reports

Remote Property Monitoring at The Nature Conservancy in California

Ethan Inlander, Katie Andrews, Contributors: Jennifer Chin, Sue Pollock, Mike McFadden, Scott Hardage, Scott Butterfield, Tod Rubin

With this publication, TNC in California marks a major shift in its approach to conservation easement monitoring. At the crossroads of conservation, stewardship and technology lies remote property monitoring, an emerging practice that uses airborne/satellite imagery and a seamless web-based platform.  This solution to meeting…


2020 | Freshwater | Terrestrial | Planning | Science | Publications & Reports

Shaping land use change and ecosystem restoration in a water-stressed agricultural landscape to achieve multiple benefits

Benjamin P. Bryant, T R. Kelsey, Adrian L. Vogl, Stacey A. Wolny, Duncan J. MacEwan, Paul C. Selmants, Tanushree Biswas, H S. Butterfield

Irrigated agriculture has grown rapidly over the last 50 years, helping food production keep pace with population growth, but also leading to significant habitat and biodiversity loss globally. Now, in some regions, land degradation and overtaxed water resources mean historical production levels may need to…


2020 | Freshwater | Science | Publications & Reports

Evaluating and Protecting Environmental Water Assets: A Guide for Land Conservation Practitioners

Author: Chris Alford, Editors and Reviewers: Amy Campbell, Monty Schmitt, Sara Press, Wendy Eliot, Bob Neale

Evaluating and Protecting Environmental Water Assets: A Guide for Land Conservation Practitioners, a publication by TNC and the Sonoma Land Trust (SLT), provides provides easy to understand guidance, resources, and tools that California land trusts, open space districts, resource conservation districts, and others can…


2020 | Freshwater | Science | Publications & Reports

Characterizing benthic macroinvertebrate and algal biological condition gradient models for California wadeable Streams, USA

Michael J. Paul, Ben Jessup, Larry R. Brown, James L. Carter, Marco Cantonatie, Donald F. Charles, Jeroen Gerritsena, David B. Herbst, Rosalina Stancheva, Jeanette Howard, Bill Isham, Rex Lowe, Raphael D. Mazor, Patina K. Mendez, Peter R. Ode, Alison O'Dowd, John Olson, Yangdong Pan, Andrew C. Rehn, Sarah Spaulding, Martha Sutula, Susanna Theroux

Water resource agencies assess stream water quality by determining the bugs and algae present to develop biotic indices. Yet translating these technical measures into meaningful language is difficult. This study finds that by placing technical numerical measures/indices into categories of condition allows resource manages to…


2020 | Terrestrial | Planning | Science | Publications & Reports

Santa Ana Mountains to eastern Peninsular Range Conservation Connectivity Infrastructure Planning Project for Interstate 15 and Closely Associated Roadways

Dr. Winston Vickers, Karen C. Drayer, Trish Smith, Brian Cohen

Highways across the greater San Diego region in southern California are major barriers and causes of mortality for mountain lions and are contributing to the species’ genetic restriction and threat of extirpation. Due to their large territories, mountain lions must regularly cross highways in this…


2020 | Freshwater | Terrestrial | Technology | Science | Publications & Reports

Mojave Desert Springs: setting an ecological baseline

Sophie S. Parker

This article appears in the Desert Report, a news publication of the Sierra Club California/Nevada Desert Committee. The article introduces the Mojave Springs Research Project, led by The Nature Conservancy, that involves a research collaboration with UCLA, the California Botanic Garden, and Partner Engineering and…


2020 | Terrestrial | Technology | Science | Data

Low-impact land use pathways to deep decarbonization of electricity

Grace C. Wu, Emily Leslie, Douglas Allen, Oluwafemi Sawyerr, D. Richard Cameron, Erica Brand, Brian Cohen, Marcela Ochoa, Arne Olson

California has ambitious climate and energy policies that call for the development of significant amounts of new zero-carbon energy by midcentury. The Power of Place study looks at multiple pathways to meet California's clean energy demand in alignment with decarbonization goals while limiting the impacts…


2020 | Terrestrial | Planning | Science | Publications & Reports

Roadmap to Restoration

Rodd Kelsey, Scott Butterfield, Abigail Hart, Ruthie Redmond, Hope Bigda-Peyton

This Policy Brief summarizes the results of a study on the potential for strategic habitat restoration in the San Joaquin Valley of California as an important part of reducing overall water demand to achieve groundwater sustainability under the Sustainable Groundwater Management Act (SGMA). It also provides policy…


2020 | Marine | Science | Publications & Reports

Effective fisheries management instrumental in improving fish stock status

Ray Hilborn, Ricardo Oscar Amoroso, Christopher M. Anderson, Julia K. Baum, Trevor A. Branch, Christopher Costello, Carryn L. de Moor, Abdelmalek Faraj, Daniel Hively, Olaf P. Jensen, Hiroyuki Kurota, L. Richard Little, Pamela Mace, Tim McClanahan, Michael C. Melnychuk, Cóilín Minto, Giacomo Chato Osio, Ana M. Parma, Maite Pons, Susana Segurado, Cody S. Szuwalski, Jono Wilson, Yimin Ye

Does fisheries management work at improving the status of fish stocks? The answer is a resounding, yes. This article compiles estimates of the status of global fish stocks, comprising roughly half of the world’s fish catch. Findings suggest that on average, fish stocks are increasing…


2020 | Terrestrial | Planning | Technology | Science | Publications & Reports

Jack and Laura Dangermond Preserve Rangeland Management Plan

Butterfield, H.S., M. Katkowski, J. Cota, O. Sage, C. Sage, K. Easterday, D. Zeleke, L. Riege, S. Gennet, K. Lin, B. Leahy, M. Bell, M. Reynolds

Cattle grazing is the dominant land management tool TNC has to manage biodiversity and reduce the threat of catastrophic wildfire at the TNC's Jack and Laura Dangermond Preserve. This Rangeland Management Plan, intended to guide rangeland management through 2025, details the adaptive management approach TNC…


2020 | Terrestrial | Science | Publications & Reports

Habitat selection by spotted owls after a megafire reflects their adaptation to historical frequent-fire regimes

Gavin M. Jones, H. Anu Kramer, Sheila A. Whitmore, William J. Berigan, Douglas J. Tempel, Connor M. Wood, Brendan K. Hobart, Tedward Erker, Fidelis A. Atuo, Nicole F. Pietrunti, Rodd Kelsey, R. J. Gutierrez, M. Zachariah Peery

This study examined spotted owl habitat selection after the King Fire in California using satellite tracking of 26 different owls . The authors found that whether severe fire was "good" or "bad" for owls depended on patch size and configuration: owls selected smaller but avoided…


2020 | Freshwater | Terrestrial | Marine | Planning | Technology | Science | Publications & Reports

Jack and Laura Dangermond Preserve Integrated Resources Management Plan

Butterfield, H.S., M. Reynolds , M.G. Gleason, M. Merrifield, B.S. Cohen, W.N. Heady, D. Cameron, T. Rick, E. Inlander, M. Katkowski, L. Riege, J. Knapp, S. Gennet, G. Gorga, K. Lin, K. Easterday, B. Leahy, M. Bell

This Plan frames the biological and cultural significance and provides the short- and long-term goals, objectives, and priority actions for the Jack and Laura Dangermond Preserve.


2020 | Terrestrial | Science | Publications & Reports

Effects of Field and Landscape Scale Habitat on Insect and Bird Damage to Sunflowers

Sara M. Kross, Breanna L. Martinico, Ryan P. Bourbour, Jason M. Townsend, Chris McColl, T. Rodd Kelsey

Agriculture-dominated landscapes harbor significantly diminished biodiversity. Woody vegetation along field margins can provide farmers with ecosystem services and benefit biodiversity. However, when crops are damaged by the biodiversity harbored in such vegetation, farmers are reluctant to incorporate field margin habitat onto their land and may…


2020 | Marine | Science | Publications & Reports

Unusual occurrences of fishes in the Southern California Current System during the warm water period of 2014–2018

H.J. Walker Jr., Philip A. Hastings, John R. Hyde, Robert N. Lea, Owyn E. Snodgrass, Lyall F. Bellquist

In response to anomalously warm sea-surface temperatures, poleward shifts in the geographic range of hundreds of marine organisms worldwide have been documented. This paper reports on the unusual occurrences of 36 fish species recorded from the Southern California Current System (SCCS) during the period of…


2020 | Terrestrial | Technology | Science | Publications & Reports

Shrub and vegetation cover predict resource selection use by an endangered species of desert lizard

Christopher J. Lortie, Jenna Braun, Michael Westphal, Taylor Noble, Mario Zuliani, Emmeleia Nix, Nargol Ghazian, Malory Owen, H. Scott Butterfield

This paper evaluates how endangered species with highly restricted habitat needs and increasingly small population sizes (using blunt-nosed leopard lizard as our example), select and use available habitat. The paper paired a novel experimental – telemetry and remotely-sensed data – and analytical – resource selection…


2020 | Freshwater | Marine | Science | Microsite

State of Salmon in California

Sally Liu, Megan Webb, Jeanette Howard, Jennifer Carah

Chinook, coho and steelhead were once tremendously abundant in most of California’s major rivers and streams. As recently as the 1960s, salmon and steelhead were so plentiful in streams that horses would get spooked trying to cross. Due to water damming and diversions, habitat degradation and…