MITIGATING DEVELOPMENT IMPACTS: CREATING PROTECTED BREEDING HABITAT FOR CALIFORNIA RED-LEGGED FROG AND CALIFORNIA TIGER SALAMANDER | |||
Sadie McGarvey; Integral Consulting Inc.; smcgarvey@integral-corp.com; | |||
In Summer 2023, a 0.3-acre seasonal pond and wetland swale were constructed within a grazed grassland parcel (mitigation site) to provide compensatory mitigation for impacts to waters of the U.S./State associated with a nearby development project. The mitigation site occurs within critical habitat for California red-legged frog (Rana draytonii) (CRLF) and proximal to critical habitat for California tiger salamander (Ambystoma californiense) (CTS) - both species are known to occur locally. Since February 2024, 13 juvenile and adult CTS and 60+ juvenile CRLF encountered during project implementation have been relocated to the mitigation site. Further, an adult CRLF was observed naturally dispersing into the new wetland, signaling early colonization. Dipnet surveys conducted in Spring 2024 resulted in negative findings for CTS and CRLF, however, surveys will be conducted in Spring 2025 and beyond to document breeding presence/absence within the created pond. The appearance of adult CRLF within the created wetland suggests a promising potential for natural colonization and future breeding at the mitigation site. Compensatory mitigation required for the development project resulted in the creation of aquatic breeding habitat and the opportunity to “seed” the mitigation site with CTS/CRLF, increasing the likelihood of refocusing breeding efforts on land protected in perpetuity. | |||
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