San Diego Management & Monitoring Program

Altered hydrology

Map this threat

MSP Threat/stressor information

MSP Threat/Stressor Background

Goals & Objectives

MSP Goals and objectives
Prioritized and Available Objectives


Argentine Ant Study
Arroyo Toad Monitoring and Management
Golden Eagle (Aquila chrysaetos) Monitoring and Management Plan
Rare Plant Inspect and Manage Monitoring 2014-2026
Southwestern Pond Turtle Recovery Project
Urban Aseasonal Flow Study

Other resources
Description: SD County Beach Water Quality Map

Files and Documents

2019 Amphibian IBI and Hydrological Impact Score

Author(s):Fisher, Robert N.

2020 Arroyo toad study design for San Diego County, California

Author(s):Tracey, Jeff; Brehme, Cheryl; Brown, Chris; Rochester, Carlton; Fisher, Robert N.

2020 Aseasonal Flow and Associated Nonnative Species in San Diego: Data Summary

Author(s):Brown, Chris; Perkins, Emily; Hitchcock, Cynthia J.; Aguilar Duran, Angelica; Guerra Salcido, Omar ; Watson, Elise; Fisher, Robert N.

2015 Assessing Presence of Argentine Ants Using the Bait Method

Author(s):Matsuda, Tritia; Brehme, Cheryl; Fisher, Robert N.

2020 Draft Final: Associations Between Arroyo Toads, Nonnative Species, Drought, and Impervious Surfaces in San Diego County

Author(s):Brown, Chris; Perkins, Emily; Hitchcock, Cynthia J.; Aguilar Duran, Angelica; Grolle, Lizzie; Watson, Elise; Fisher, Robert N.

2018 Longevity and population age structure of the arroyo southwestern toad (Anaxyrus californicus) with drought implications

Author(s):Brehme, Cheryl; Fisher, Robert N.; Hathaway, Stacie; Hovey, Tim; Stokes, Drew; Warburton, Manna

2022 Range-wide persistence of the endangered arroyo toad (Anaxyrus californicus) for 20+ years following a prolonged drough

Author(s):Hitchcock, Cynthia J.; Gallegos, Elizabeth; Backlin, Adam R.; Barabe, Russell; Bloom, Peter; Boss, Kimberly; Brehme, Cheryl; Brown, Chris; Clark, Denise; Clark, Elizabeth, R.; Cooper, Kevin; Donnell, Julie; Ervin, Edward; Famolaro, Pete; Guilliam, Kim, M.; Hancock, Jacquelyn, J.; Hess, Nicholas; Howard, Steven; Hubbartt, Valerie; Lieske, Patrick; Lovich, Robert; Matsuda, Tritia; Meyer-Wilkins, Katherin; Muri, Kamarul; Nerhus, Barry; Nordland, Jeff; Ortega, Brock; Packard, Robert H.; Ramirez, Ruben; Stewart, Sam, C.; Warburton, Manna; Wells, Jeffery M.; Winkleman, Ryan; Winter, Kirsten; Zitt, Brian; Fisher, Robert N.

Responses of Arroyo Toads to Wildfires

Author(s):Brown, Chris; Brehme, Cheryl; Hathaway, Stacie; Fisher, Robert N.