Rare Plant Stabilization Plan Status
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2-1-1 Chapter 2.1.0: RARE PLANT STABILIZATION PLAN STATUS General Rare Plant Issues This section includes a discussion on the taxon status, genetic storage, outplanting and threats for each rare plant taxa covered by the MIP. The requirements for stabilization are to achieve a stable number of mature plants, have a population structure which can maintain that number of mature plants, obtain full genetic storage, and control all observed threats at each MFS PU. This will be done by implementing Population Unit (PU) and Management Unit (MU) management at all of the ‘Manage for Stability’ PUs. The most current list of the MFS PUs were proposed in the 2006 Status Report. Management designation changes discussed at last years IT meeting have been incorporated in this year report. In addition, NRS have included a Stabilization Plan for Gouania vitifolia that was found to require stabilization by the 2007 Mākua Military Reservation Biological Opinion from the USFWS. General rare plant issues are discussed below followed by 27 Species Status Summaries for each of the MIP taxa and the Stabilization Plan from Gouania vitifolia. Propagation infrastructure NRS has been working with NARS on the construction of an additional shade-house at the Pahole Mid-elevation Nursery. The frame and ground work is largely complete and NRS expect to have the shade cloth attached and benches and irrigation infrastructure complete in the next year. NRS has continued to work with State NARS Horticulturist, Doug Okamoto, on projects at the Pahole Mid-Elevation Nursery and on stock from Pahole NAR. Mr. Okamoto has been extremely valuable in providing assistance in maintaining stock and providing expertise on propagation and outplanting. He has been maintaining critical stock from the Pahole NAR at the Pahole Mid-Elevation Nursery and at Lyon Arboretum. NRS continue to use two plant growth chambers at the Schofield baseyard for germination and early stage propagation. Research Issues Research issues related to propagation and threats are discussed in detail in Chapter 5 Research Activities and in the Species Status Summary for each taxon. NRS had identified several propagation research projects in the last year. In particular, methods to produce seed from greenhouse collections of Dubautia herbstobatae, Viola chamissoniana, and Schiedea obovata were to be studied. These projects were successful in determining pollination techniques and producing viable seeds from hand-pollination and these methods will be utilized for producing propagules for meeting genetic storage goals in the coming years. In addition, research on determining the best collection and storage techniques for Cyanea superba subsp. superba showed that mature seeds which are collected and dried can be germinated and stored with greater success than previously observed collections. Living Collections NRS has identified several MIP taxa that would benefit from having a living collection of plants for genetic storage, propagation, and threat control research. In the last year, NRS began preliminary discussions with Office of Hawaiian Affairs (OHA) about expanding sites at Waimea Botanical Garden. During a site visit, potential planting sites for several taxa were discussed and a proposal will be submitted to OHA in January 2008, once the transfer of management from the Audubon Society is complete. This site can be used to hold stock from 2007 Mākua Implementation Plan Status Report Chapter 2.1.0 Rare Plant Stabilization Plan Status 2-1-2 PUs where threat control is not yet in place, produce propagules for genetic storage and conduct propagation research. Monitoring NRS was unable to fill the Monitoring Program Manager Position. In the next year, NRS will contract Jim Jacobi (USGS Botanist) to address monitoring issues, develop monitoring protocols, oversee implementation of sampling methods, and begin analysis. In the absence of a Monitoring Manger NRS was involved in a limited number of projects including the three discussed below. First, intensive monitoring of Sanicula mariversa to begin to collect demography data and develop Population Viability Analysis (PVA) models for the species to better guide management (see Chapter 2.1.23). Second, the deployment of weather stations at Phyllostegia kaalaensis reintroduction sites to measure micro site variation and begin to collect environmental data that may be important for developing future reintroduction plans (see Chapter 2.1.20). Finally, this year NRS began a trial vegetation mapping project for Mākua Military Reservation with help from the Jim Jacobi and Stephen Ambagas, of USGS. The two objectives of this project are to prepare a detailed vegetation map focused on the northwestern section of the Mākua Action Area and conduct a pilot study using very high resolution multi- spectral imagery to map the distribution and abundance of selected native and alien plant species in Kahanahāiki and ‘Ōhikilolo management units. The vegetation mapping will follow methodologies developed by S. Ambagis and J. Jacobi and will utilize the object-based classification software eCognition with IKONOS and QuickBird satellite imagery as well as very high resolution digital image data. This data is collected with a multi-spectral camera mounted on a helicopter to be flown over Mākua Valley. In March of this year, high resolution (15-20cm) imagery was collected with a multi-spectral camera and other equipment brought here from the mainland. Unfortunately, the weather was not optimal for collecting data and many of the areas covered are not useful because of cloud shadow. To supplement this data lower resolution Quickbird (MS 2.6m) and IKONOS (MS 4m) data will need to be used in more areas than initially planned. The imagery has been processed and S. Ambagis is looking at it along with the Quickbird data. S. Ambagis is working on coming up with spectral signatures for the different plant species that could be identified in the images. NRS is assisting by collecting ground data on areas identified by S. Ambagis. In August 2007 a meeting was held to go over some possible signature areas and to confirm these sites with NRS knowledge of the ground in those areas. NRS and USGS-BRD continue to move forward with this project, and are planning to use it to stratify monitoring plot placement in the near future. NRS are interested in other very high-resolution imaging systems currently being developed that can be deployed in Hawai‘i such as the project being led by Dr. Greg Asner of the Carnegie Institute (Asner et al. 2007). Stabilization Strategy This is the third year that NRS has used the stabilization strategy for designing rare plant management. The new stabilization species Gouania vitifolia was analyzed with the strategy described previously (OANRP 2006) and a draft stabilization plan is included here (Chapter 2.1.12). 2007 Mākua Implementation Plan Status Report Chapter 2.1.0 Rare Plant Stabilization Plan Status 2-1-3 Example of Species Status Summary The species status summary outlines all PU work conducted for each of the 28 MIP taxa. Each species summary has the same format. Each section is explained in detail in the example below: Requirements for Stability: This section defines requirements for reaching stability for each taxon. • 3 Population Units (PUs) are designated for all species. However, for species meeting the following criteria 4 PUs have been designated: o with presence in both Makua Action Area (AA) and Schofield AA (Example: Plantago princeps) o for species occurring in the high fire threat area of the Makua AA (Example Chamaesyce celastroides) o for taxa that have no extant wild PUs and therefore rely completely on reintroduction for stability (Example Cyanea superba) • [25-100] reproducing individuals in each PU (justification based on the number of individuals, average life span, life form, and other factors from the final MIP) • Threats controlled: may include fences, weed control, arthropod and rodent control • Complete genetic representation of all PUs in storage: may include nursery living collections, seed storage, and tissue culture storage • Expedited Stabilization: (5 or 10 yrs) Expedited Stabilization is required for 12 species identified in the 2007 Biological Opinion (BO). Expedited stabilization actions will not begin until NRS receive the additional funding needed to accomplish these new goals. How many of the 4 How many of the How many of the 4 How many of the 4 How many MFS MFS PUs have 4 MFS PUs have MFS PUs have full MFS PUs are PUs that need stable numbers of had in situ genetic storage? protected from reintroductions mature individuals? recruitment? ungulates? have been initiated? 2/4 3/4 1/4 1/4 0/2 This table provides a general overview of progress on the stabilization of the MFS PUs for each species. The second and fifth questions have changed slightly to reflect shorter term assessments of the long term goals outlined in the 20 year MIP plan. Taxon-Level Discussion The taxon-level discussion covers the topics below related to taxon status: • Are any of the threats controlled for all or any of the PUs? Is there a trend in threat levels at the PU that warrant a management change? • Does the taxon or any of its’ PUs have stable numbers of reproducing individuals? Stable population structure? • Are any of the PUs in need of reintroduction or augmentation? If so, has this begun? How is it going? • Are there significant propagation or genetic storage issues? • Are there new taxonomy issues? • General prognosis for the taxon given current threat control trends. 2007 Mākua Implementation Plan Status Report Chapter 2.1.0 Rare Plant Stabilization Plan Status 2-1-4 Table Table 2.1.2a Taxon Status Summary Example ‘Taxon Status’ Example ‘Taxon 2007 Mākua Implementation Plan Status Report Chapter 2.1.0 Rare Plant Stabilization Plan Status 2-1-5 This table displays the current status of the wild and outplanted plants in each PU and the 2006 population estimates for comparison.