22 de julio de 2023

Exotic & Invasive plants by Lawsons Brook (Williams Lake) in Halifax NS, July 20/21, 2023

I conducted an "opportunistic"survey of exotic and invasive species (as well as recording what else is there) on Lawsons Brook, the stream draining Williams Lake on the Halifax south mainland on July 20, 2023. I returned on July 21 to sort out some observations in the initial sections, these days during breaks in an an incredible deluge of precipitation over a few weeks. So the photos show Lawsons Brook with a lot of water, unusual for mid-summer in years past.

It is a beautiful yellow birch-lined wet riparian corridor that has escaped recent fires (last 70+ years) . It has a history of industrial use in settler times.

There are 14 "sections" proceeding from Purcells Cove Road to Williams Lake: 00, 0-1, 1-2, 2-3, 3-4, 4-5, 5-6, 6-7, 7-9, 8-9, 9-10, 10-11, 11-12, 12-13. More details to follow. The Lat & Longs are prob +/- up to 10-20m, (Olympus Tough TG4 camera) re: forest canopy. I have Garmin GPS readings for section positions, 'will post those later, also some of the native species.

Invasive species uploaded to date are listed under the tag InvExoSurvey20Jy2023LawsonBk

Uploading ongoing (Jul28, 2023) - david p

Publicado el julio 22, 2023 11:41 TARDE por jackpine22 jackpine22 | 0 comentarios | Deja un comentario

13 de julio de 2023

Brackish marsh at Lawrencetown on the Eastern Shore of Nova Scotia 13Jul2023

I studied this marsh in the summer of 1975 with the collaboration of Cathy and Paul Keddy who were graduate students at Dalhousie University at the time. It lies across the road from the very popular Lawrencetown Beach; waters off the nearby headland are a popular surfing area. I created a Project for the larger marsh area: https://www.inaturalist.org/projects/east-lawrencetown-ns-brackish-marsh

The marsh borders a tidal, brackish lake. Proceeding from 'the road' towards open water, one crosses a sequence of what we described as 14 visually distinct zones. View extracts from a scientific paper posted on the web at http://versicolor.ca/LawrencetownBrackishMarsh/

I visited the marsh again on June 9, 2005; I am posting some plant photos from that visit on iNaturalist, partially to refresh my memory, as I will be accompanying participants in a Botany Field Class there shortly... close to 48 years after the 1975 survey. More to follow... hopefully.

July 15, 2023: Successful venture yesterday as a "Guest Prof." in the Dalhousie University summer field class Flora of Nova Scotia, instructors Sean Haughian & Nick Hill. New entries from the field class participants can be viewed on the Project Page, but the focus of the class was on collection of materials to prepare formal botanical specimens of flowering angiosperms, not on making posts on iNaturalist. The instructors were impressed with the site, I think, especially the diversity of sedges, and the very diverse 'buckbean meadow' at the beginning of the route from the road towards Lawrencetown Lake. Overall, the site seemed to have changed very little from 1975.

Publicado el julio 13, 2023 12:45 TARDE por jackpine22 jackpine22 | 0 comentarios | Deja un comentario

31 de octubre de 2022

What's Common at Piggy Mt & Environs - or anywhere

While iNaturalist is super-good at recording occurrence of 'interesting species' and species lists for particular areas, it can often be difficult to decipher what's actually common in a particular area/time of year, i.e., what you would see on the ground when you go there. And I am thinking that with climate change etc., we may in the future want to know more about what is or was common at a particular site at a particular time than what is or was unusual, or rare, or just of particular interest at that site.

So as a very impromptu experiment in using iNaturalist to record 'what you see', I documented all of the plant species that were readily visible when I made a short trek to "Piggy Mt" yesterday (Oct 30, 2022). Most of this area burned to the ground during the "Spryfield Fire" in the spring of 2009 and is still regenerating.

I wanted to do this without creating a new Project, so as not to increase 'Project Clutter' (I am quite guilty of that); so I am doing it with a combination of (i) tags to ID broad habitat or plant community types and (ii) this journal post. 'Will see how it works. I also included with many of the species records, habitat pics, something I like to do routinely.

An issue: I couldn't place a simple map in the journal post. But I can post a URL to the first recorded observation. The 3rd photo on this species record is a map of the routes with 5 plant community types indicated:
https://www.inaturalist.org/observations/140580046

Plant Communities, Tag, & Link to list of species

Under the "Observations" section below I have given one record from each of the 5 habitat-Plant Community types.

Some thoughts having completed the exercise

Piggy Mt. is visited fairly frequently by naturalists, but there had been very few observation recorded on iNaturalist: only 7 observations/6 species; those were: Broom Crowberry (1 obs), Jack Pine (2) white throated sparrow (1), two mushroom species (2 obs) & British Soldier Lichen (1). Of those 7 observations 4 were mine (so I wasn't making much effort to record 'what's there'); 6 of the observations were made 2017-2020.

One observation, of Jack Pine, was dated 2007, this by Burkhard Plache, entered on iNaturalist in 2017, see https://www.inaturalist.org/observations/5966749. It's an important one because that was pre-fire. So his photos illustrate what the site looked like not long before it burned. (Burkhard recently died as a result of a tragic swimming/storm wave event; he knew the Backlands well and introduced many to the area myself included.)

Was it worthwhile to do this exercise?

I think so if one wanted to answer the question- what are some common plants at Piggy Mt.?

It took me about 4 hours to enter all of the records and write this post.

Formalizing my observations forced me to look a little closer than I would have normally. That resulted in (i) my recognizing the presence of the invasive Alder Buckthorn (to be confirmed), and (ii) my looking closer at the birches than I would have otherwise. It was difficult to assign most of the birches definitively to one of Paper Birch and Grey Birch, and I suspect most are hybrids. Well that's a hypothesis. But now I will look more closely at birches at other times of year and in other areas of the Backlands... are apparent hybrids prevalent in certain habitat types, and the pure types in others?

Also, I realize I had missed recording at least one common species: teaberry, at least I think it was. So I should keep the lists open, by using the same tags in future. I haven't used tags much in the past; I think they are really helpful in compiling lists for particular areas or exercises.

I did this project and wrote this post mostly for myself - I have a need of "little projects", just to make such walks interesting and make me more observant - but I would welcome any comments. I am still learning how to use iNaturalist effectively.

  • JackPine22 (David P).
Publicado el octubre 31, 2022 01:13 TARDE por jackpine22 jackpine22 | 5 observaciones | 0 comentarios | Deja un comentario

04 de agosto de 2019

Barrier Beach at Hubbards Nova Scotia #2

Next to (east of) the popular sandy swimming beach in upper St. Margaret's Bay, Nova Scotiathere is a shingle bar/barrier beach with a "barachois" (salty lagoon) behind it. Yesterday, I did a quick survey, recording all common plant species. I created a Place for it Barrier Beach at Hubbards Nova Scotia #2.

Barrier Beach at Hubbards Nova Scotia #1 is on the swimming beach; I mistakenly mapped that one as a Place first and couldn't eliminate it because other observers already had observations there. Anyway, 'good to keep it and contrast that highly disturbed system, with #2, which is not much disturbed.

Publicado el agosto 4, 2019 01:03 TARDE por jackpine22 jackpine22 | 0 comentarios | Deja un comentario

18 de septiembre de 2018

Carriacou stuff

In late Jan to mid-March 2016, I re-surveyed seagrass beds around the island of Carriacou (which belongs to Grenada), that I had surveyed as a graduate student in 1968. The surveys included documentation of all "readily visible" epifauna and flora. I will be posting pics of the different species in a Project (Seagrass bed Flora & Fauna of Carriacou, Grenada 2016) I created, looking for confirmation. This will take a while!

Publicado el septiembre 18, 2018 09:28 TARDE por jackpine22 jackpine22 | 0 comentarios | Deja un comentario

05 de septiembre de 2018

First trial using iPhone

I registered with iNaturalist back in 2012... but only today, Sep 5, 2018, have I actually tried to use it! I became a smart phone user ony recently so that was part of the delay. Anyway, today I photographed about 15 species, most of which I knew, and wow was I impressed with the "Suggestions". So I am sold on it. 'Still a lot to understand about how the community around it works, but "I'm in!"

Publicado el septiembre 5, 2018 11:12 TARDE por jackpine22 jackpine22 | 0 comentarios | Deja un comentario

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