So much info goes by us every day… some Stuff I want to tag
–A new tool in our toolbox for buckthorn control: Critical period cutting
By Laura Domyancich-Lee August 18, 2023 for fmr.prg. “In 2021, we were able to hire a contractor to scale up and refine that approach of buckthorn removal and try “critical period cutting” — an innovative technique that uses what we know about buckthorn growth to eliminate any need for herbicide use.”
– On Eastern Dwarf Mistletoe in Nova Scotia
On nsforestnotes.ca Mar 30, 2022 Retired DNR pest and GIS specialist Bob Guscott has had an “obsession” with Eastern Dwarf Mistletoe for many years. He recently shared his wealth of knowledge about this early flowering Nova Scotia plant in a presentation to the Nova Scotia Wild Flora Society, available now as a YouTube Video….
–Everything you need to know about HRM council’s Nov. 28 meeting
The Coast Nov 30, 2023…Budget Committee…Jerry Blackwood, the city’s chief financial officer, oversees the municipal budget. It guides city spending, which will be about $1 billion next fiscal year when all’s said and done…In our current fiscal year—April 1, 2023 through March 31, 2024—the city is projected to run a deficit of $8 million…In a lot of ways the city is not financially sustainable…The city is not financially sustainable because our development choices and transportation choices have been objectively the wrong ones for about 70 years, give or take a few.
The concept of the perilimnion
Ogden, James Gordon, Proceedings of the Nova Scotian Institute of Science, 36(3/4), 137-141.”Seasonal variations in surface and ground water supply and increasing attention to ionic and mass balances in aquatic eco-systems require more specific definitions of hydrologic parameters to recognize sources and sinks for biologically significant geochemistry. The term “Perilimnion” is proposed to define that zone of the catchment in which groundwater developed by surface runoff and percolation may enter (or leave) the limnic environment. The perilimnion, therefore, is an aquifer, whose geochemistry may affect, or be affected by, the waters of a lake. The term “Tardelimnion” is proposed to define that portion of the limnicenvironment in which deposition of limnogenic sediments (autochthonous or allochthonous) contribute to an aquitard, whose low coefficient of hydraulic permeability (<10-6 cm-1) virtually precludes significant hydrologic or geochemical interaction between lake and ground waters.”
On Forest Thinning/self thinning etc
Stump sprout formation by red maple (Acer rubrum L.) in Nova Scotia
Prager, U.E. & Goldsmith, F.B. (1978). In Nova Scotia. Proceedings of the Nova Scotian Institute of Science, 28(1/2), 93-99. p98, conclusions for management, growing tallest trees, biggest trees, feed for deer. Self thinning.
Related: Stump sprouting of four northern hardwoods
Solomon, Dale S., and Barton M. Blum. in Vol. 59. Northeastern Forest Experiment Station, Forest Service, US Department of Agriculture, 1967.
Yellow Birch, Paper Birch, Sugar Maple, Beech. Red Maple most prolific. Spouts as a function of stump size etc.
Toward managing mixed-species stands: from parametrization to prescription<
Pretzsch and Zenner Forest Ecosystems (2017) 4:19 “A better understanding and a more quantitative design of mixed-species stands will contribute to more integrative and goal-oriented research in mixed-species forests…”
The long-term branching and diameter response of pre-commercially thinned hardwood stands in Nova Scotia
Jane Nicholson et al. 2010. NS Gov Doc
The principle of self-thinning is most easily described by the temporal changes that occur in the numbers of trees in
undisturbed even-aged stands. However, self-thinning also occurs in uneven-aged stands. According to this principle, the
finite growing space of a stand is occupied by progressively fewer trees as average tree size increases with stand age.
Trees at a competitive disadvantage die from crowding and suppression as stands approach a limiting number of trees of a
given average size that can coexist within an area. As stands reach the stem exclusion stage of development (Chapter 5),
tree crowns expand to fill the available growing space. Crown expansion continues until an upper limit of tree crowding is
reached. Thereafter, stands follow a relatively predictable course of density-dependent tree mortality as numbers of trees
per unit area decrease with increasing average tree size. It is generally assumed that the combined effects of crown
expansion and tree mortality are compensatory so that canopy closure is always maintained except in the presence of
‘irregular’ mortality. The latter may be caused by such factors as air pollution, high winds, flooding, epidemic insect and
disease outbreaks, and other factors.
A global synthesis on the effects of thinning on hydrological processes: Implications for forest management
Antonio D. del Campo et al., 2022.
The silver bullet that wasn’t: Rapid agronomic weed adaptations to glyphosate in North America
Christopher Landau et al., 2023 PNAS Nexus, Volume 2, Issue 12, December 2023, pgad338,
Parents prohibited from watching Halifax youth basketball games after poor behaviour
CTV News Atlantic Reporter dec 14, 2023
Automata: The Extraordinary “Robots” Designed Hundreds Of Years Ago
On Youtube, under Timeline – World History Documentaries
ocumentary presented by Professor Simon Schaffer which charts the amazing and untold story of automata – extraordinary clockwork machines designed hundreds of years ago to mimic and recreate life. The film brings the past to life in vivid detail as we see how and why these masterpieces were built. Travelling around Europe, Simon uncovers the history of these machines and shows us some of the most spectacular examples, from an entire working automaton city to a small boy who can be programmed to write and even a device that can play chess. All the machines Simon visits show a level of technical sophistication and ambition that still amazes today. Thx CCF!!!!