照片/聲音

什麼

紅網牛肝菌 (Suillellus luridus)

觀察者

hkovacik

日期

7月 15, 2024 20:15 EDT

照片/聲音

觀察者

wdvanhem

日期

6月 2024

地點

Ontario, CA (Google, OSM)

描述

I think this is R. griseus. The stipe was not as intensely yellow as the R. ornatipes I've seen at the same site, and the taste was only slightly bitter.

Not collected.

照片/聲音

什麼

絨邊乳菇 (Lactarius pubescens)

觀察者

limestonecedar

日期

8月 22, 2019 16:45 EDT

描述

I found this beefy mushroom growing in the lawn about 1.5 m from my compost bin. Nearby trees include Black Walnut (Juglans nigra) and Norway Spruce (Picea abies). An apple (Malus sp.) stump was nearby.

Despite the look of this mushroom, it is fresh and not at all slimy. Does anyone have any idea what genus or species this is (Boletellus sp. and Tapinella atrotomentosa have been suggested)? Do you think that it’s parasitized?

照片/聲音

觀察者

wdvanhem

日期

12月 31, 2023 13:47 EST

描述

Dry-mesic loamy till under hawthorns and Scots pine.

Spores 8-10 x 5-6 μm
Odor not distinctive

WDV 515

照片/聲音

什麼

病毒 ( Viruses)

觀察者

davidfbird

日期

7月 18, 1995

地點

saskatoon (Google, OSM)

描述

Bacteriophages and bacteria from saline ponds and lakes of southern Saskatchewan. A volume of fixed sample water, about a tenth of a ml in these environments, is concentrated by filtration onto a exceedingly fine filter, and stained with a fluorescent dye that lights up when docked on nucleic acids (both DNA and RNA). This makes the viruses and bacteria (and phytoplankton) visible for counting in an epifluorescence microscope. Even the smallest viruses become visible and countable.

But isn't the resolution of the light microscope a factor of ten too large to see viruses? The trick works according to the same principles that allow you to see and count stars that are 16000 light years away: because they are sources of bright light compared to the background. The stars appear substantial, but their real diameter is almost infinitely smaller than the size that they appear to your eye.
In these photos, bacteria appear relatively large. In the first photo, I count roughly 50 bacteria. But you can see that the viruses that are parasites of bacteria, or bacteriophages, are very much more abundant. There are between 25 and 30 bacteriophages for every bacterium. This has probably been the relative abundance of bacteria and their phages in these environments for 100s of millions or even billions of years. How this equilibrium is maintained is pretty much a mystery for the moment. More below (tomorrow).

Fungi

照片/聲音

什麼

真菌 ( Fungi)

觀察者

msergio

日期

5月 22, 2023 13:08 EDT

地點

Guelph (Google, OSM)

照片/聲音

什麼

疣柄牛肝菌屬 ( Leccinum)

觀察者

hikinggurl

日期

7月 16, 2023 13:49 MDT

照片/聲音

什麼

傘形多孔菌 (Polyporus umbellatus)

觀察者

prunstedler

日期

6月 20, 2022 12:53 EDT

地點

Waterloo (Google, OSM)