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West Babine Sustainable Resource Management Plan

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3.1.1.1 Biodiversity Elements<br />

a. Seral stage distribution and old growth retention<br />

Targets for early, mature plus old and old seral stages are based on an updated interpretation<br />

of the average fire return intervals for the Sub-Boreal Spruce (SBS) zone and the Englemann<br />

Spruce, Subalpine Fir (ESSF) zone (Steventon, 2002). The Interior Cedar-Hemlock (ICH)<br />

zone was not examined in that report and is therefore, based on the Biodiversity Guidebook<br />

(MoF 1996a). Furthermore, the Kispiox LRMP directs 12 per cent retention of old growth<br />

forest within each mid-sized watershed in the plan area. 9 This percentage has been met by<br />

mapping Core Ecosystems (see Map 6, page 71). Treatment Units identified by the <strong>Babine</strong><br />

LRUP (TU2, forest ecosystem networks) have been incorporated into these Core<br />

Ecosystems. 10<br />

b. Landscape connectivity<br />

Landscape Riparian Corridors have been mapped to provide connectivity of mature and old<br />

forest cover along valley bottom riparian areas and linking lowland to upland areas (see<br />

Map 6, page 71). Corridors are concentrated around major tributaries to the <strong>Babine</strong> River,<br />

and connections between high value wildlife habitat.<br />

c. Spatial distribution of cutblocks<br />

Targets for spatial distribution of cutblocks, also called “patch size distribution,” are based<br />

on the pattern that would be expected due to natural disturbances such as fire and windthrow.<br />

The distribution of patch sizes varies depending on the ecosystem. The assumption is that the<br />

wildlife and flora within these ecosystems will be adapted to the landscape pattern and will<br />

fare better if these patterns are emulated.<br />

d. Wildlife tree retention<br />

Targets have been identified to maintain structural features of old forests within harvested<br />

areas.<br />

Requirements for wildlife tree retention are greater when patches exceed 80 hectares<br />

(BCMoF, 1996a). This increase is to ensure that larger openings maintain the structural and<br />

functional features required by species, including connectivity and habitat structure for small<br />

animals such as furbearers. Maintaining habitat within cutblocks also supports First Nations<br />

interests in wildlife and trapping.<br />

e. Stand structure<br />

In addition to wildlife tree patches, additional consideration is required to maintain stand<br />

complexity, particularly in the ICH and the ESSF. Given the variable nature of this attribute,<br />

no objectives are provided. However, operational foresters should consider retaining advance<br />

9 This LRMP objective differs slightly from the targets outlined in the Landscape Unit <strong>Plan</strong>ning Guide. Because the LRMP<br />

objective is a higher level plan, it takes precedence over the Landscape Unit <strong>Plan</strong>ning Guide targets.<br />

10 Note: Zoning for Core Ecosystems does not impede the right of First Nations to exercise their traditional activities.<br />

March 2004 Page 13

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