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#grasslands

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A trait-based model to describe plant community dynamics in managed #grasslands (GrasslandTraitSim.jl v1.0.0)
by Felix Nößler, Thibault Moulin, Oksana Buzhdygan, Britta Tietjen, and Felix May doi.org/pfrn via EGUsphere 
#PlantScience

doi.orgA trait-based model to describe plant community dynamics in managed grasslands (GrasslandTraitSim.jl v1.0.0)Abstract. Temperate semi-natural grassland plant communities are expected to shift under global change, mainly due to land use and climate change. However, the interaction of different drivers on diversity and the influence of diversity on the provision of ecosystem services are not fully understood. To synthesise the knowledge on grassland dynamics and to be able to predict community shifts under different land use and climate change scenarios, we developed the GrasslandTraitSim.jl model. In contrast to previously published grassland models, we link morphological plant traits to species-specific processes via transfer functions, thus avoiding a large number of species-specific parameters that are difficult to measure and calibrate. This allows any number of species to be simulated based on a list of commonly measured traits: specific leaf area, maximum height, leaf nitrogen per leaf mass, leaf biomass per plant biomass, above-ground biomass per plant biomass, root surface area per below-ground biomass, and arbuscular mycorrhizal colonisation rate. For each species, the dynamics of the above- and below-ground biomass and its height are simulated with a daily time step. While the soil water content is simulated dynamically, the nutrient dynamics are kept simple, assuming that the nutrient availability depends on total soil nitrogen and the total plant biomass. We present a model description, which is complemented by online documentation with tutorials, flowcharts, and interactive graphics, and calibrate the model to grassland sites with different number of mowing events and grazing intensity in central Germany. Furthermore, we show how the model can be used to conduct simulation experiments to analyse shifts in plant community composition under different land use intensities. We believe that the GrasslandTraitSim.jl model is a useful tool for predicting plant biomass production and plant functional composition of temperate grasslands in response to management under climate change.

: , and : What’s the Difference?

"When most of us step into our gardens or take a walk in the woods and stumble across a patch of plants with long and slender leaves and large seed heads, we assume we’re looking at a type of grass. However, there’s an enormous amount of diversity in the plant world, and plants that we think are grasses may actually be rushes or sedges. Knowing how to differentiate these plants—collectively known as graminoids—can be a fun exercise in plant identification; it’s also helpful for determining what plants will grow best in your native garden.

"Recently, I had the privilege of attending Jill Weber’s workshop on grass identification, which was organized by Native Gardens of Blue Hill. During the workshop, attendees gained hands-on experience identifying an assortment of native grasses, sedges and rushes, and I wanted to share what I learned with you! In the guide below, we’ll cover some of the key points on grass identification. You’ll also find some suggestions for the best native grasses, sedges and rushes to grow in your own garden.

Grasses, Sedges and Rushes: What’s the Difference?

"Grasses, sedges and rushes may look a lot a like at first glance, but there are a few ways to tell these plants apart. The identification tips below can help you determine what plants are growing in your garden. For more detailed information, you may want to explore the grass ID section on the Go Botany website or consult a quality plant identification book.

Grasses (Poaceae)

"True grasses are found throughout Maine, and throughout the world. Many of our most common grasses are not native to Maine and thrive in sunny and warm locations like fields and abandoned pastures; however, many native grasses are very cold hardy, some prefer wet environments and others grow happily in shade. Interestingly, the majority of our food crops actually belong to the grass family and those include wheat, rice, barley, oats, millet and bamboo!

"A clear way to determine if a graminoid is a true grass is by analyzing its stem and leaf formation. Grasses generally have flattened or rounded stems with pronounced joints or nodes (think bamboo!) Grasses also have 'two ranked' leaves, which means the leaves sprout on two sides of the plant. If you peel a grass blade down from the stem and expose the plant’s papery ligule, you’ll find that many grass ligules are easy to see with a hand lens and can be smooth or ragged on the margin, although some grasses don’t have ligules at all.*

* This is much easier to see with a loupe!

"Some of the most attractive species of true grasses that are native to Maine include:

(Eragrostis spectabilis)
(Schizachyrium scoparium)
(Andropogon gerardii)
(Cinna latifolia)
(Panicum virgatum)

Sedges (Cyperaceae)

"Sedges can look a lot like true grasses, and they’re likely to be found in moist soils, although some sedges can tolerate dry conditions. Sedge seed heads are very variable, and some sedges have lots of ornamental appeal.

"The easiest way to determine if a plant is a sedge or not is to feel its stem. Sedge stems are generally triangular in shape and they won’t roll easily between your fingers. The leaves of sedges are typically three ranked, encircling the plant’s stem on three vertical planes. If you peel back a sedge leaf, you’ll notice that their papery ligules are triangular in form, often less noticeable than those of the grasses.

"Sedges can be useful in rain or water gardens, but some sedges can be grown in standard ornamental beds, or even used as a no-mow lawn substitute for small areas.

"If you’re interested in trying out sedges in your landscape, look for these native Maine species:

(Carex pensylvanica)
(Carex vulpinoidea)
(Carex scoparia)
(Carex gynandra)
(Carex stricta)

Rushes (Juncaceae)

"Like sedges, many rushes and woodrushes prefer moist soil, and some rushes are appropriate for garden planting. Water-loving rushes make spectacular additions to rain gardens or small ponds, or they can be grown in poorly draining sections of your yard where other plants won’t thrive.

"Unlike sedges, rushes have rounded stems, but they lack the nodes that are found in true grasses. Rush flowers can be inconspicuous, but many species can hold their own in any flower garden. Rush leaves typically sprout from the base of the plant and encircle the plant’s stems; however, rushes can be varied and particular species may have different leaf formations.

"If you’re on the hunt for rushes to try in water features or in ornamental beds, these Maine natives are a great place to start:

(Juncus effusus)
(Luzula multiflora)
(Juncus balticus)
(Juncus canadensis)
(Luzula acuminata)

How to use in the landscape

"Grasses, sedges and rushes offer a lot of benefits to the home gardener. Not only are graminoids beautiful, but their seed heads can provide an important food source for wild birds in late summer, autumn and winter. When interplanted with other native , graminoids provide texture to gardens, as well as movement when their leaves catch in the breeze. Many graminoids also stay upright during winter, providing winter interest and habitat for wildlife. And, not to be overlooked, graminoids are also useful for if you’re interested in crafting!

"On a larger scale, graminoids serve as and they help to counter climate change by absorbing carbon dioxide from the atmosphere. Some graminoids are useful for erosion control or for projects. In wetland areas, grasses, rushes and sedges can aid with , and they provide habitat and food for various species.

"When growing graminoids in your garden, make sure you consider the plant’s specific light, water and soil requirements. Some grasses are more suitable for gardens than others and offer a variety of leaf color, stiffness, height and seed characteristics. Rushes and sedges can be essential additions to rain gardens and other water features. Many native graminoids are spectacularly low maintenance, and they need very minimal water once established. Growing them in your garden or replacing some of your turf grass lawn with native ornamental grasses, sedges and rushes can cut down your lawn maintenance needs and also make your garden that much more !"

nativemainegardens.org/single-

native-gardens-maine · Grasses, Sedges and Rushes: What’s the Difference?When most of us step into our gardens or take a walk in the woods and stumble across a patch of plants with long and slender leaves and large seed heads, we assume we’re looking at a type of grass. However, there’s an enormous amount of diversity in the plant world, and plants that we think are grasses may actually be rushes or sedges. Knowing how to differentiate these plants—collectively known as graminoids—can be a fun exercise in plant identification; it’s also helpful for determining what p

'Dying of thirst' as climate-driven floods mix with oil

Maura Ajak & Stephanie Stafford

"Herders scooping murky water from a small pond in grasslands in South Sudan are well aware of the dangers they face if they drink it.

"'The water is dirty because this place has oil - it has chemicals in it,' says their chief, Chilhok Puot.

"Nyatabah, a woman from this community raising cows in the heart of oil fields in Unity State, adds: 'If you drink it, it makes you pant and cough.

"'We know it's bad water, but we don't have anywhere else, we're dying of thirst.'

"A former oil engineer, David Bojo Leju, has told the BBC World service that flooding in the area is washing into water sources.

"Large swathes of the state have been under water for several years after unprecedented , which scientists say has been worsened by .

"Mr Bojo Leju says the floods are a 'disaster' and that pollution from mismanaged oil facilities is a 'silent killer' spreading across the state.

"South Sudan is the world’s youngest country and one of its poorest, with a government hugely dependent on oil revenue.

"Unity State, a major oil-producing state, has always experienced seasonal flooding. But in 2019, brought a deluge that engulfed , and . Year after year of intense rainfall followed. The water built up, trapped on the clay soil.

"At the worst point in 2022, two-thirds of Unity State were submerged, according to the UN World Food Programme () - even now, it says about 40% is still under water."

Read more:
bbc.com/news/articles/c4gpmx7z

www.bbc.comClimate change: Floods 'spreading oil pollution' in South SudanWith swathes of South Sudan submerged, a whistleblower warns water sources are being polluted by oil.

While feral domesticated cats are a big problem in a lot of places (including NYC) and need vigorous / or relocation, need to be protected!

In , try to save one of the world’s most

by Sarah Brown on 13 June 2024

via @mongabay

"- ’s cat, a small wild feline, is endemic to the Pampas grasslands that sprawl over southern Brazil, and northeastern .

"- With fewer than 100 individuals left in the wild, experts call Muñoa’s pampas cat one of the most endangered felines in the world and warn it go extinct within 10 years as its natural habitat is cleared for .

- plans to save the species include switching from to extensive ranching that preserves the natural , creating a program, and developing a trinational conservation agreement.

"- Recent in the Brazilian state of , where many Muñoa’s Pampas cat sightings have been recorded, have currently halted all local efforts, putting the future of this feline at risk."

Read more:
news.mongabay.com/2024/06/in-b

Mongabay Environmental News · In Brazil, conservationists try to save one of the world’s most endangered catsThe Pampas grasslands, spanning southern Brazil, Uruguay, and northeastern Argentina, are home to a wildcat so rare that researchers consider it the most endangered of its kind in the Americas, and possibly the world. Most sightings of this domestic cat-sized feline come from camera-trap images that have documented its distinctive fawn-colored coat, fluffy fur and […]

From 2023: 's restoration project to receive funding in proposed [] state budget

, or manoomin in , is central to Ojibwe identity and is part of the culture’s migration story.

by Frank Vaisvilas
February 17, 2023

ONEIDA – "Part of Gov. ’ proposed budget includes $875,000 to help fund the Oneida Nation’s environmental restoration project on the reservation.

"Over the past year, the tribe has restored about 3,000 acres of , , and on the reservation.

"The governor’s budget includes an annual investment of $175,000 for five years for continuing the Oneida Nation’s work and bird monitoring project just west of .

"'We know that can provide for itself if allowed to. A years-long restoration of Oneida’s lands in Northeastern Wisconsin has led to improvements in water quality and the return of ,' said Oneida Chairman Tehassi Hill in a statement. 'We appreciate Governor Evers for supporting our work to restore and protect Wisconsin’s natural spaces.'

"The Oneida Nation also started a bird monitoring project on its restoration sites in coordination with the Northeastern Wisconsin Society and UW-Green Bay’s Cofrin Center for Biodiversity to research how birds are responding to the tribe’s conservation efforts.

"'We’ve witnessed firsthand as state-threatened bird species, like the , have returned to restored Oneida Nation lands, an incredible testament to the importance of this restoration work,' said Erin Giese, president of the Northeastern Wisconsin Audubon Society, in a statement.

[...]

"Evers’ budget proposal also includes a $200,000 investment in restoring and protecting natural wild rice areas in Wisconsin.

"Experts say wild rice is an essential food source for many of the in the area, including many species of , , , , and .

"The plants also help to improve the .

"'Emergent plants, including wild rice, help promote quality through the filtering and storage of nutrients and slow down wave action in the of Green Bay,' said Dr. Amy Carrozzino-Lyon, University of Wisconsin-Green Bay restoration project manager in the natural and applied sciences department. 'A diversity of native wetland plants helps the community function at its best.'"

Read more:
greenbaypressgazette.com/story





Green Bay Press-Gazette · Oneida Nation's environmental restoration project to receive funding in proposed state budgetBy Frank Vaisvilas