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Vast swaths of Pennsylvania forests were clear-cut circa 1900 and regrowth has largely been from local native plant communities, but a team of researchers has found that invasive, non-native plants are making significant inroads with unconventional natural gas development.
Wetland Studies and Solutions, Inc. (WSSI) is seeking a mid-level (or senior) candidate to be trained and mentored by a nationally recognized senior tree preservation expert and related skilled technical and management staff. Candidate should be experienced with performing specimen tree assessments (CTLA or TRAQ); reviewing civil, architectural, and landscape architecture plans, details, and specifications for conflicts with trees; and performing forest stand delineations/EVAs. The ideal candidate...
Application time expires: 18 Aug 2017
Four new PhD positions in Kenya, Tanzania and Switzerland are available at the Woody Weeds project: - Implementing Sustainable Land Management (SLM) strategies to mitigate the negative impacts of woody invasive alien species in the East Usambara Mountains, Tanzania (Sokoine University of Agriculture, Morogoro, Tanzania) - Implementing Sustainable Land Management (SLM) strategies to mitigate the negative impacts of woody invasive alien species in Baringo County (CETRAD, Nanyuki, Kenya) - Principles...
Application time expires: 14 Aug 2017
Earthworms that are invasive to Canada's boreal forest are mainly from the family Lumbricidae and they have the potential to change ecosystem carbon sequestration and biodiversity. Traditional methods used to survey earthworms rely on finding specimens, consume large amounts of time and labour, and are expensive. A sensitive genetic method to detect earthworm DNA in soil would provide a fast, relatively low cost method for earthworm survey. In this study, PCR primers were used to detect earthworm...
The success of some invasive tree species is attributed, in part, to high fecundity in the form of sexual propagules. If invasive trees produce more seed annually than co-occurring native trees, they will have a greater ability to disperse and establish across the landscape. In this study, seed production of female Ailanthus trees was investigated to determine (1) reproductive age limits; (2) annual and cumulative seed output; and (3) seed viability. Existing data on Ailanthus seed production were...
Work area: Southeastern Pennsylvania and New Jersey Start date: As early as July 5, 2017 End date:  September 29, 2017 with possible extension for those with completed degrees depending on company work load. Job Description/ Requirements: Shultz Forest Management and Consulting LLC is seeking applicants to fill a full time (40hrs/week) temporary Forestry Technician position. The primary focus of this position is to aid in forest management of private and public lands, forest restoration through...
Application time expires: 11 Jul 2017
This position will conduct Timber Stand Improvement (TSI) operations to improve foraging and maternity habitat for forest dwelling bats, remove invasive species, and release crop trees to increase regeneration of desirable species. The position requires strong summer and winter tree identification skills, knowledge and experience in TSI operations, and herbicide application. The position requires that the individual be, or become, a state certified pesticide applicator. Treatments will be conducted...
Application time expires: 20 Aug 2017
A PhD studentship is available to work as part of an international research group investigating the risks of establishment by the invasive Emerald Ash Borer beetle into the UK, northern Europe, and western Canada. By exploring the beetle’s relationship with temperature and host resistance, the project will determine how the cooler climates of these regions will influence the life cycle and rate of spread of EAB, model its potential impact upon different ash tree species, and ensure management strategies...
Application time expires: 21 Jul 2017
Citation Cattet M, Stenhouse GB, Janz DM, et al. The quantification of reproductive hormones in the hair of captive adult brown bears and their application as indicators of sex and reproductive state. Conservation Physiology. 2017;5(1):cox032. doi: 10.1093/conphys/cox032 . Abstract Recognizing the potential value of steroid hormone measurements to augment non-invasive genetic sampling, we developed procedures based on enzyme-linked immunoassays to quantify reproductive steroid hormone concentrations...
Austrian “Apfel strudel” and the Italian “Castagnaccio” are only two of the many culinary recipes that are traditional in Europe. But did you know that their main ingredients are the product of trees – Malus domestica and Castanea sativa – that are actually non-native to Europe? Many trees and crops have been introduced to Europe over the last centuries but when does a species become “invasive”? Could newly introduced tree species be an opportunity in this uncertain era of climatic changes? Scientists...

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