Connecting people with nature in Ontario's Mississippi Valley

Local Plant Species

A complete list of all the plants which might be found in our local Lanark county area is of course an extensive one. Unlike, for example, the list of snakes, which contains only nine.

The are a number of sources with lists of many plants in unique rare habitats within the region.

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Lanark County Birds Checklist

Lanark County Birds

This checklist was created by the MVFN Birding Committee with input from local birders, eBird and Iain Wilkes’ Big Year List.   This is a list of 283 possible species within Lanark county as well as the ones that were recorded within 2014 including locations where most of the species were seen.

Lanark County Birds Checklist

Careful consideration was put into the species to include in this list. Note that some birds such as Barn Owls, which may be a once-in-a-lifetime sighting for the area, were not included. The list includes birds which one may reasonably expect to see in the area at this time.

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Native Freshwater Mussels of the Ottawa Valley

The speaker shows her mussels at natural history talk, a report of the April 2013 MVFN lecture report by Jim Bendell

At a recent natural history lecture in Almonte, the Mississippi Valley Field Naturalists (MVFN) welcomed ‘malacologist’ Jacqueline Madill, Senior Research Assistant, Zoology, Research and Collections, Canadian Museum of Nature as guest speaker for the MVFN 2012-13 ‘Nature Beneath our Feet’ lectures. Madill’s subject was the important but little-understood or appreciated, ‘Native Fresh-water Mussels of the Ottawa Valley’ and she brought many several favourite specimens to the talk. About one-third of the worlds’ mussel species live in North America, with 55 species in Canada, of which 41 are found in Ontario. Madill reminded us first thing that we should not pick up mussels from the river bottom; each species inhabits only a specific water zone and they have limited locomotion. Not only that but freshwater mussels are considered one of the most endangered group of species in North America, with 67% at risk!

Mussels and Clams belong to the family Mollusca (derived from Latin: soft), a very large group of soft-bodied animals that also includes the Chitons, Tooth Shells, Snails and Slugs, Oysters, and the Nautili, Squids and Octopuses! Look them up and be amazed! In abundance and diversity, they are second only to the Arthropods (which includes Insects), and were among the first creatures on earth. Mussels and clams range in size from barely visible to approximately 20 cm in length. Both are bivalves living in a box of two shells. Think of the Blue Mussels or clam chowder you last ate at the fish restaurant, said Madill. Two limey (mainly calcium carbonate) shells enclose their ‘bivalve’ body in a box that may be opened or closed for passage of water, and protection. This structure reflects the life of a sedentary animal (or couch potato), no head or limbs but a muscular foot that provides anchorage and infrequent locomotion. About the body is a mantle that produces the shell and aids in growth and reproduction. Within the body there are various organs that work as in our own. Most important are the gut and gills that act in feeding, as part of a giant filter.

Madill and others assess Mussel biodiversity and numbers in local lakes and rivers as part of their work. Hinge structure and other features are used for identification and often identification can be made just by the feel of the shell underwater. Mussel species may vary in numbers from zero, to a few, to such an amazing density one cannot walk without treading on a shell. Here they earn the names ‘Heelsplitter’ and ‘Ouch’! Other more ‘happy as a Clam’ individuals are Rainbow, Warty Back and Maple Leaf. Eastern Elliptis is a very common species locally, and others such as a Cylindrical Papershell found in Quebec, had not been seen since the 1830’s.

Why mess with mussels? Well, we must agree that water is fundamental to life. Here in the Ottawa Valley we are well supplied with five major rivers and many smaller streams, and so should have abundant clean water and excellent aquatic life. But if we are to sustain and improve our standard of living we must care for our waters. And the study and care for Mussels and Clams are part of that concern because these little-known animals give many ecological benefits. Perhaps the most significant is their filtering; an individual may ingest and clean 3 liters of water per hour, removing toxic chemicals, excess nutrients, harmful bacteria and viruses, and importantly light blocking matter. They also provide benefit by mixing sediments as they slowly move. They provide food for fish, muskrats, shorebirds and others. Also since some mussels are quite long lived, many living decades, they carry within their tissues a useful record of biological and chemical changes in the environment. As they age annual rings form in the shell as in a tree. According to Madill, some Eastern Pondshells can live 200 years!

But why are Mussels so endangered? At one time, commercial harvest and disruption from log drives reduced their numbers, but these are not ongoing. Now the sermon; sadly, and to our peril, the current plight of bivalves reflects the damage we have done and are doing to water and its inhabitants. Mussels need clean, clear running water relatively high in oxygen and water bodies connected to maintain stable levels and flow, provide nutrients, and permit dispersal of the young. In turn, the density and persistence of these creatures are good indicators of healthy waters. Main disrupters are dams and locks that restrict flow and cause extreme fluctuation in temperature and levels of water. According to Madill, it can take 50-100 years for an area of mussels to be reestablished once it has been disrupted. Mussels are also particularly sensitive to pollutants of many kinds which include fertilizers from lawns and cropland. Many large water bodies and waterways have been made uninhabitable by channeling, loss of near shore habitat, and choking with litter and debris. Another significant threat has been the invasive Zebra Mussel, perhaps the most damaging to our native bivalves, as well as to human infrastructure such as intake pipes. It appeared in the Great Lakes in 1988 on ships from Middle Europe. Of incredible reproductive capacity, one female can produce 30,000 to 1,000,000 larvae annually. Madill noted that Mussels of the Rideau River have suffered a ‘double whammy’ from Zebra Mussels and the rapid and alternating water levels due to the canal locks. In 10 years Zebra Mussels have spread throughout the Great lakes smothering large beds of native bivalves.

Another issue raised by Madill’s was the intriguing connection between the decline of particular Mussel species and the decline of biodiversity in local fish. The explanation is as follows. Mussels and clams live partially buried in sediment with little traveling about, which potentially restricts their distribution. The problem is solved by some Mussel species which produce specialized larvae, called glochidia (from the Greek: pointed or hooked), that are shed in clouds, manage to attach to the gills of a particular species of host fish, and so are transported. They then drop off in new habitat suitable to both fish and Mussel. For example, the female Pocket-Book Mussel extends its mantle, the tip of which is shaped, marked and moves like a small fish. This attracts a desired larger fish for a lift. When the fish ‘takes the bait’ the Mussel ejects a puff of glochidia that attach to the gills, thus obtaining a convenient taxi for its young! Other species mimic a worm to attract a ‘ride’. Check out Youtube.com for videos of some of these creative mussel displays, says Madill.

What can we do to improve the health of our waters and native fresh-water Molluscs? How can we make a Mussel as “happy as Clam?” If you would like further information, please contact our speaker, she welcomes inquiries and can be contacted at the Canadian Nature Museum Research Building in Gatineau or via email . An excellent reference guide to local Mussels is by J. Metcalfe-Smith, A. MacKenzie, I. Carmichael and D. McGoldrick, Photo Field Guide to the Freshwater Mussels of Ontario, 2005, published by the St. Thomas Field Naturalist Club. Other useful references for general information on the zoology and ecology of Mussels and Clams include on-line information on Mussels of Eastern Ontario at pinicola.ca and books by Clarke, A. H. 1981, The Fresh Water Molluscs of Canada. National Museum of Natural Sciences, National Museum of Canada, and T.I. Storer and R. L. Usinger, 1957, General Zoology, McGraw-Hill, Toronto.

 

2013 madill lecture (844x1024)

 

Jacqueline Madill (left) spoke about the important but little-understood or appreciated, ‘Native Freshwater Mussels of the Ottawa Valley’ and brought many of her favourite Mollusca specimens to the talk, such as the Eastern Elliptio, a very common freshwater Mussel. Photo Pauline Donaldson

 

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“Ground Beetles— My Favourite Group” presented by Henri Goulet, Agriculture and Agri-food Canada

‘Ground beetles’, a spectacular insect group, featured at MVFN natural history talk

Report of October 2012 MVFN Lecture

by Joel Byrne

About 350,000 species of beetles occupy this planet. They are found in nearly every terrestrial habitat and many watery ones, pole to pole. There are more named species of beetles than there are named species of any other group. When I saw the title of Dr. Henri Goulet’s presentation to the Mississippi Valley Field Naturalists: My Favourite Insect Group – Ground Beetles (Carabidae), I thought of a quote attributed to J.B.S. Haldane, a distinguished British biologist, who, when asked what he had learned about the ‘creator’ from looking at nature, replied that the creator “. . . has an inordinate fondness for beetles,” referring to the enormous abundance of beetle species. Henri Goulet, MVFN’s second speaker, in the lecture series Nature Beneath Our Feet, is a research scientist emeritus with Agriculture and Agri-Food Canada, and he also has a fondness for beetles—ground beetles. Why, out of 160 families of beetles would he choose to study ground beetles? The answer was found in his talk, as he shared some of his fond memories in a lifetime of adventures tracking down his favourite group of animals.

Henri (he is a friend) opened his talk by posing some basic questions: what is a beetle, what is a ground beetle? A series of photos outstanding for their clarity, detail, and colour followed, displaying anatomical features of beetles that distinguish them from other insect Orders. One could clearly see that the beetles have no tail-like structure and that their wing covers do not overlap. It is these wing covers or elytra which give rise to the name of the Order of insects to which beetles belong, i.e. Coleoptera, meaning ‘sheath wings’ in Greek. In this Order is a suborder, Adephaga, meaning ‘voracious.’ And in this voracious group is the ground beetle family, Carabidae, our speaker’s favourite.

Carabid beetles number some 1700 species strong in North America; 250 species around Ottawa. The carabids have long antennae, large jaws, and long legs. Some are very fast, among the fastest animals in the world, for their size. Combine their murderous mandibles with their long speedy legs and you have a formidable predator. Even their larvae are usually big-jawed, active insect predators. All this is bad for their prey, often invertebrates, and good for us since a lot of invertebrates we consider farm and garden pests, aphids, slugs and caterpillars, are consumed. If any invertebrate wishes to avoid being devoured by a ground beetle in Canada, they should retire to a cave, since this is one of the few habitats ground beetles don’t inhabit, we learned.

Then came the big question, posed by Henri—Why do I find ground beetles fascinating? Henri’s fascination and fondness for ground beetles goes back to his childhood days in winters when he dug down in snow, then into and under the leaves where he found many of his pals stiff with cold, and warmed them up. But what got Henri interested initially in studying ground beetles was seeing species with dark metallic reflections.

There are many other reasons ground beetles became so fascinating to Henri. Unlike butterflies and dragonflies which quickly fly away, adult ground beetles are easy to pick up under debris or under the soil surface. The adults are quite easily seen, ranging in size from 1.5 mm to 30 mm, most being 5-10 mm in size. Adults live at least one season and of course, can be found even under snow. Adults come in a great variety of shapes. Many shiny black ground beetles have a ‘typical’ shape, athletic, but some are anything but typical. The ‘snail eater’ is a case in point having ‘strikingly elongated mouth parts’ the better to lunch on the inside of a snail’s shell. There are round sand beetles that look like pills. Bombardier beetles are much wider aft than most, perhaps to house a sort of two-chambered gun at the end of their abdomen where they mix hot chemical ‘bullets’ and ‘fire’ them with an audible pop at anything that threatens them. Many in the Adephaga suborder are ‘accomplished stinkers’, thus avoiding predation.

Henri then showed us phenomenal photos of what, I believe, fascinated us all the most— their great variety of colours. The wing-cover slides alone, entitled Elytral Sculpture, were worth the price of admission. “Our perception is very much affected by what we are.” We are humans and most of us are more interested in butterflies than a lot of black beetles because as humans we are attracted to colours. So when the first slide of elytral sculpture popped onto the screen there was a collective sigh. Mind-bogglingly beautiful metallic greens, bronzes, purples and blue blacks, more emerald greens. Also turquoise wing covers trimmed with copper called ‘the best’ in Canada, Carabus vietinghoffi, from the land of small willows. It was as if a sculptor and a jewelry designer had collaborated in crafting them.

Carabus vietinghoffi (1024x768)

 

As if an expert sculptor and jeweler had collaborated to craft it! A Carabus vietinghoffi, from the ‘land of small willows,’ with its turquoise wing covers trimmed with copper. This is the ground beetle Henri considered ‘the best’ in Canada. Photo Henri Goulet.

 

There followed a series of photos of completely-assembled, i.e. entire specimens of ground beetles, starting with solely black species, then switching to beetles ranging from pale to dark single-coloured, to two-coloured species, and then three-coloured species. Then came the ones with dark metallic reflections, the ones that initially interested Henri, then ones with bright metallic reflections (my favourites), and then species with two and three hues of metallic reflections, and finally species with metallic hue and pigment colours. At which point Henri said, “So I hope I’ve exposed you to a lot of colours.” We were mesmerized, colour-saturated!

 

Elaphrus clairvillei (1024x901)

 

This ground beetle, Elaphrus clairvillei, inhabits only marshy meadows and swampy places. Dr. Goulet is an excellent photographer and here, as in many photographs, he has captured the stunning beauty of the beetle. Photo courtesy Henri Goulet.

The balance of the talk was devoted to many other special features of ground beetles which could have been a talk in itself. Most ground beetles hide in the day. Look for them under logs and rocks, and in stumps. Ground beetles are found on all land habitats except in water (one species stays under rocks submerged by tides). Most species are potentially excellent bio-indicators because their habitat requirement varies from quite narrow to extremely narrow. For example Elaphrus clairvillei inhabits marshy meadows and swampy places, but will not live in bogs as they are too acidic. Some adult ground beetles are very long-lived, 2-7 years. Most ground beetles are finicky about where they live but not fussy about what they eat. A good example, ‘caterpillar hunters’ (Calasoma sycophanta), are forest ground beetles which emerge in the spring, look around for their prey and venture out and stay out if their prey is present, otherwise they return to the ground. Among ground beetles there are predators, scavengers, and herbivores (many are ‘weed-seed’ eaters), and even parasites (the very colourful leaf beetle parasites for example)—a very wide range of modes of life indeed.

Ground Beetle talk (1024x768)

 

A huge fan of the ‘ground’ beetles, Dr. Henri Goulet (centre), fields questions after his talk at the Almonte United Church, while others examine some of the many species specimens provided by the speaker for display. Photo Pauline Donaldson

The talk wound down with a lively question and answer period, while in the background the slide show continued. There was an initial burst of oohs! and ahs! as very colourful beetles seemed to dash across the screen: fabulous close-ups of live tiger beetles on the hunt. What a spectacular way to end the show!

A word about Henri Goulet’s photographs— superb! His photos, taken with meticulous care, will long be remembered by those who set aside a few hours of a fall evening to learn and be entertained by the learning. What I came away with was the impression of incredible beauty in the colours and design of the host of ground beetles, each species with its own variation on the general plan.

I enjoyed the lecture so much I saw it twice!

Resources: reference books on ground beetles are Common Ground Beetles (1987) by Trevor G. Forsyth and An Illustrated Identification Guide to Adults and Larvae of Northeastern North America Ground Beetles (2010) by Yves Bousquet.

 

 

 

 

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