Response of Nesting Lapland Longspurs (<i>Calcarius lapponicus</i>) to Burned Tundra on the Seward Peninsula

The response of breeding Lapland longspurs to burned sedge tussock-shrub tundra was studied in 1978 on the Seward Peninsula in an area burned by lightning-ignited fires during 1977. In late May and mid-June 1978, plant standing crop in burned tundra was < 5% of standing crop in unburned tundra. Lapland longspurs were less abundant in burned than in unburned tundra. An average of 1.4 longspurs he' were recorded in burned tundra, whereas 4.6 longspurs h" were seen in unburned tundra. One longspur nest was found in 5 ha of burned tundra; three were found in 5 ha of unburned tundra. Nest locations in burned and unburned tundra were similar though nests in burned tundra generally had less protective cover. Several factors may be involved in the reduced abundance of Lapland longspurs in burned tundra. TOFPB. KaK 4.6 xansanncKMx IIO~O~OXHMKOB 3a uac na6smnasocb B necoxxenHoA Tynnpe. Hamaki OAHO rne3110 nannanpcrcoro nonopoxnma B 5 remapax coaxenno2 TYHA~~I; TPM Hamm B 5 remapax HecomennoR ~g~npb~. He 6nso oseBMnnux P~~HMII B menonorm rne3no~oti TyHnpe B006me "em Menme 3a11wz~oro nacaxnenm. 06cpnamzc~ HecKoamue mamopa, KoTopare Moxez 6bITb OTHOCRTCR K penbmu- nesTeabnoczM Merny coxxemoti YI HecoxxeHnoA ~g~np~ti, a pa3~enienm mean 6x914 noxoxMe apyr Ha apyra, XOTZ r~e3~a B comemoR Tennow 06uam aansanncKoro nonopoxnnKa B coaxemoh Tynnpe.