Data Science can be used to inform environmental management and policy. We have been working with several NSW Government stakeholders to give insight into how the Sydney community interacts with it's beautiful harbour.
A stage-structured delayed advection reaction-diffusion model for single spec...IJECEIAES
In this paper, we derived a delay advection reaction-diffusion equation with linear advection term from a stage-structured model, then the derived equation is used under the homogeneous Dirichlet boundary conditions 푢 푚 ( 0, 푡 ) = 0, 푢 푚 ( 퐿, 푡 ) = 0, and the initial condition 푢 푚 ( 푥, 0 ) = 푢 ( 푥 ) > 0, 푥 ∈ [−휏, 0] with 푢 푚 0 (0) > 0 in order to find the minimum value of domain 퐿 that prevents extinction of the species under the effect of advection reaction-diffusion equation. Finally, for the measurement the time lengths from birth to the development of the species population, time delays are integrated. 푚 0
Mathematical modelling of Fish Resources Harvesting with Predator at Maximum Sustainable Yield
Kinfe Hailemariam Hntsaa, Zenebe Taka Mengesha (PhD)b*
aDepartment of Mathematics, Aksum University, Axum, Ethiopia, kinfhail@gmail.com
bDepartment of Biology, Aksum University, Axum, Ethiopia, zenebeteka2007@gmail.com
In this study, the population dynamic of fish is considered following Logistic model with the inclusion of harvesting. The prey-predator interaction is also considered with an assumption that the predator population which is completely theoretical and not physically defined has a little effect on the growth of prey population provided that there are no limiting factors other than the predators. This is to say that the prey-predator cycle remains stable as far as other factors are constant in the natural environment. The growth function of the predator population is constructed corresponding to the prey population, and its results showed that the predator population size is either convergent to a finite positive limit, zero or diverges to positive infinity; while the fish population size follows Logistic function and grows to an upper asymptote. Furthermore, the prey-predator interaction is considered with the assumption that the predator population has an effect on the growth of the prey population and the predator population has intra-specific competition for a limited environmental resource. Its result showed that the predator population size did not go to infinity without bound. In both cases the maximum sustainable yield is obtained, numerical simulation and stability analysis of the model are included.
This booklet is designed to act as a resource booklet for a field trip into the Gunbower forest, however, it should also be useful for schools studying environmental watering and wetlands in other areas. I have also uploaded a second booklet, a field work booklet, which contains student tasks. Not working properly? Try this link: https://drive.google.com/file/d/0B11DeM9q7KJCaF9mMDFwWUF2NTg/edit?usp=sharing
Socio-ecological valuation of ecosystem services along the West Antarctic Pen...Jeff Bowman
The Palmer Long Term Ecological Research (LTER) project is located along the West Antarctic Peninsula (WAP), one of the most rapidly warming regions on the planet. Despite its remoteness the WAP supports a variety of social and economic activities, most notably in the fishing and tourism industries and in international scientific research. Because of the growing pressures imposed by these activities, the rapid rate of environmental change, relatively pristine nature of the environment, its trophic complexity, and rich scientific record, the WAP is an ideal place to explore the impact of climate change on marine and terrestrial ecosystems and the services and benefits they provide. Here we present a schema to conduct an initial assessment of WAP marine and terrestrial ecosystem services that will serve as a critical baseline for future studies, and that is broadly applicable to other LTER sites. We will combine social valuation and qualitative, expert-based modelling to identify relevant ecosystem services and to conduct an initial assessment and valuation of ecosystem service supply for the WAP region. The Palmer LTER team of investigators includes experts in topics ranging from physical oceanographic processes, to microbiology, to marine avian and mammal ecology. Through interviews and an online survey we will evaluate the views and perceptions of Antarctic ecosystem services and their changes among this group of experts. Our focus will be on biophysical ecosystem services, but we will include cultural ecosystem services and the impacts of changes on ecosystem functioning and ecosystem service supply in the expert elicitations. This qualitative, socio-ecological valuation will guide an expanded future assessment of WAP ecosystem services that include economic and socio-cultural realms of ecosystem service as perceived and valued by an expanded pool of experts and stakeholders.
Chaning the Course of Conservation
Contents:
Shade-a-lator
Water Temperature Tracking Tool (W3T)
Nutrient Tracking Tool (NTT)
Stream Function Assessment Method
Case Study: Rudio Creek
Uplift from 2013 Projects
Why quantify?: The application of new tools and methods to accurately quantify the ecological benefits of conservation actions provides numerous benefits to practitioners, landowners, regulators, conservation grant makers and policy makers charged with
managing our natural resources and environment.
- Grants and other investments can be targeted based on modeled ecological benefits (outcome-based) – potentially a more precise method than the traditional evaluation of proposed actions (process-based).
- Landowners, particularly farmers, ranchers and foresters, can better determine current (pre-project) conditions and accurately track uplift (post-project) from conservation on their lands.
- Practitioners can improve project design and associated monitoring efforts.
- Regulators could better track performance towards water quality or species targets within a watershed, by accumulating quantified results from projects over time.
- Lawmakers and other policy leaders could use quantified results from projects on the ground to better guide public investment in conservation.
http://www.thefreshwatertrust.org/
A stage-structured delayed advection reaction-diffusion model for single spec...IJECEIAES
In this paper, we derived a delay advection reaction-diffusion equation with linear advection term from a stage-structured model, then the derived equation is used under the homogeneous Dirichlet boundary conditions 푢 푚 ( 0, 푡 ) = 0, 푢 푚 ( 퐿, 푡 ) = 0, and the initial condition 푢 푚 ( 푥, 0 ) = 푢 ( 푥 ) > 0, 푥 ∈ [−휏, 0] with 푢 푚 0 (0) > 0 in order to find the minimum value of domain 퐿 that prevents extinction of the species under the effect of advection reaction-diffusion equation. Finally, for the measurement the time lengths from birth to the development of the species population, time delays are integrated. 푚 0
Mathematical modelling of Fish Resources Harvesting with Predator at Maximum Sustainable Yield
Kinfe Hailemariam Hntsaa, Zenebe Taka Mengesha (PhD)b*
aDepartment of Mathematics, Aksum University, Axum, Ethiopia, kinfhail@gmail.com
bDepartment of Biology, Aksum University, Axum, Ethiopia, zenebeteka2007@gmail.com
In this study, the population dynamic of fish is considered following Logistic model with the inclusion of harvesting. The prey-predator interaction is also considered with an assumption that the predator population which is completely theoretical and not physically defined has a little effect on the growth of prey population provided that there are no limiting factors other than the predators. This is to say that the prey-predator cycle remains stable as far as other factors are constant in the natural environment. The growth function of the predator population is constructed corresponding to the prey population, and its results showed that the predator population size is either convergent to a finite positive limit, zero or diverges to positive infinity; while the fish population size follows Logistic function and grows to an upper asymptote. Furthermore, the prey-predator interaction is considered with the assumption that the predator population has an effect on the growth of the prey population and the predator population has intra-specific competition for a limited environmental resource. Its result showed that the predator population size did not go to infinity without bound. In both cases the maximum sustainable yield is obtained, numerical simulation and stability analysis of the model are included.
This booklet is designed to act as a resource booklet for a field trip into the Gunbower forest, however, it should also be useful for schools studying environmental watering and wetlands in other areas. I have also uploaded a second booklet, a field work booklet, which contains student tasks. Not working properly? Try this link: https://drive.google.com/file/d/0B11DeM9q7KJCaF9mMDFwWUF2NTg/edit?usp=sharing
Socio-ecological valuation of ecosystem services along the West Antarctic Pen...Jeff Bowman
The Palmer Long Term Ecological Research (LTER) project is located along the West Antarctic Peninsula (WAP), one of the most rapidly warming regions on the planet. Despite its remoteness the WAP supports a variety of social and economic activities, most notably in the fishing and tourism industries and in international scientific research. Because of the growing pressures imposed by these activities, the rapid rate of environmental change, relatively pristine nature of the environment, its trophic complexity, and rich scientific record, the WAP is an ideal place to explore the impact of climate change on marine and terrestrial ecosystems and the services and benefits they provide. Here we present a schema to conduct an initial assessment of WAP marine and terrestrial ecosystem services that will serve as a critical baseline for future studies, and that is broadly applicable to other LTER sites. We will combine social valuation and qualitative, expert-based modelling to identify relevant ecosystem services and to conduct an initial assessment and valuation of ecosystem service supply for the WAP region. The Palmer LTER team of investigators includes experts in topics ranging from physical oceanographic processes, to microbiology, to marine avian and mammal ecology. Through interviews and an online survey we will evaluate the views and perceptions of Antarctic ecosystem services and their changes among this group of experts. Our focus will be on biophysical ecosystem services, but we will include cultural ecosystem services and the impacts of changes on ecosystem functioning and ecosystem service supply in the expert elicitations. This qualitative, socio-ecological valuation will guide an expanded future assessment of WAP ecosystem services that include economic and socio-cultural realms of ecosystem service as perceived and valued by an expanded pool of experts and stakeholders.
Chaning the Course of Conservation
Contents:
Shade-a-lator
Water Temperature Tracking Tool (W3T)
Nutrient Tracking Tool (NTT)
Stream Function Assessment Method
Case Study: Rudio Creek
Uplift from 2013 Projects
Why quantify?: The application of new tools and methods to accurately quantify the ecological benefits of conservation actions provides numerous benefits to practitioners, landowners, regulators, conservation grant makers and policy makers charged with
managing our natural resources and environment.
- Grants and other investments can be targeted based on modeled ecological benefits (outcome-based) – potentially a more precise method than the traditional evaluation of proposed actions (process-based).
- Landowners, particularly farmers, ranchers and foresters, can better determine current (pre-project) conditions and accurately track uplift (post-project) from conservation on their lands.
- Practitioners can improve project design and associated monitoring efforts.
- Regulators could better track performance towards water quality or species targets within a watershed, by accumulating quantified results from projects over time.
- Lawmakers and other policy leaders could use quantified results from projects on the ground to better guide public investment in conservation.
http://www.thefreshwatertrust.org/
SWaRMA_IRBM_Module2_#4, Water ecosystem interaction, Susan CuddyICIMOD
This presentation is the part of 12-day (28 January–8 February 2019) training workshop on “Multi-scale Integrated River Basin Management (IRBM) from the Hindu Kush Himalayan Perspective” organized by the Strengthening Water Resources Management in Afghanistan (SWaRMA) Initiative of the International Centre for Integrated Mountain Development (ICIMOD), and targeted at participants from Afghanistan.
Similar to Sydney Harbour: Innovative Environmental Data Science in Australia's most iconic waterway (20)
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
Many companies today use green washing to lure the public into thinking they are conserving the environment but in real sense they are doing more harm. There have been such several cases from very big companies here in Kenya and also globally. This ranges from various sectors from manufacturing and goes to consumer products. Educating people on greenwashing will enable people to make better choices based on their analysis and not on what they see on marketing sites.
17. Species distribution models
A model that relates
environmental predictors
to known species locations
across a landscape
To provide
understanding or
prediction
18. Fig. 1. (a) Example presence-only data—atlas records of where the tree species An-
gophora costata has been reported to be present, west of Sydney, Australia. The study
region is shaded. (b) A map of minimum temperature (◦
C) over the study region. Vari-
ables such as this are used to model how intensity of A. costata presence relates to the
environment. (c) A species distribution model, modeling the association between A. costata
and a suite of environmental variables. This is the fitted intensity function for A. costata
records per km2
, modeled as a quadratic function of four environmental variables using a
point process model as in Section 4.
example is given in Figure 1(a). This figure gives all locations where a par-
perform well in characterizing
the natural distributions of
species (within their current
range)
Occurrence points Enviro predictor Model prediction
Warton and Sheppard (2010) Annals App. Stat.
Elith et al (2009) Annu. Rev. Ecol. Evol. Syst. 2009.
Warton and Aarts (2013) J. Anim. Ecol.
useful ecological insight and
strong predictive capability
19. Ecological Applications, 24(1), 2014, pp. 71–83
Ó 2014 by the Ecological Society of America
Prediction of fishing effort distributions
using boosted regression trees
CANDAN U. SOYKAN,1,2,3
TOMOHARU EGUCHI,1
SUZANNE KOHIN,2
AND HEIDI DEWAR
2
1
Marine Mammal and Turtle Division, Southwest Fisheries Science Center, National Marine Fisheries Service,
National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, California 92037 USA
2
Fisheries Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service,
National Oceanic and Atmospheric Administration, 8901 La Jolla Shores Drive, La Jolla, California 92037 USA
Abstract. Concerns about bycatch of protected species have become a dominant factor
shaping fisheries management. However, efforts to mitigate bycatch are often hindered by a
lack of data on the distributions of fishing effort and protected species. One approach to
overcoming this problem has been to overlay the distribution of past fishing effort with known
locations of protected species, often obtained through satellite telemetry and occurrence data,
to identify potential bycatch hotspots. This approach, however, generates static bycatch risk
maps, calling into question their ability to forecast into the future, particularly when dealing
with spatiotemporally dynamic fisheries and highly migratory bycatch species. In this study,
we use boosted regression trees to model the spatiotemporal distribution of fishing effort for
two distinct fisheries in the North Pacific Ocean, the albacore (Thunnus alalunga) troll fishery
and the California drift gillnet fishery that targets swordfish (Xiphias gladius). Our results
suggest that it is possible to accurately predict fishing effort using ,10 readily available
predictor variables (cross-validated correlations between model predictions and observed data
;0.6). Although the two fisheries are quite different in their gears and fishing areas, their
respective models had high predictive ability, even when input data sets were restricted to a
fraction of the full time series. The implications for conservation and management are
encouraging: Across a range of target species, fishing methods, and spatial scales, even a
relatively short time series of fisheries data may suffice to accurately predict the location of
fishing effort into the future. In combination with species distribution modeling of bycatch
species, this approach holds promise as a mitigation tool when observer data are limited. Even
in data-rich regions, modeling fishing effort and bycatch may provide more accurate estimates
of bycatch risk than partial observer coverage for fisheries and bycatch species that are heavily
influenced by dynamic oceanographic conditions.
Key words: albacore; bycatch mitigation; dynamic oceanographic conditions; fisheries management;
marine spatial planning; species distribution modeling; swordfish.
INTRODUCTION or negligible given the costs and logistics associated with
such efforts. Although such obstacles impede direct
FIG. 1. Maps of cumulative fishing effort: (A) West Coast drift gillnet (DGN; measured as number of gear sets) and (B) North
Pacific albacore troll (AT; measured as number of days fished) fisheries. Individual grid cells are 100
3100
for the drift gillnet fishery
and 18318 for the albacore troll fishery. The drift gillnet fishery data cover the period 1981–2001, and the albacore troll fishery data
cover the period 1991–2010. Grid cells with fewer than three total sets or days fished have been censored for confidentiality.
January 2014 75PREDICTING FISHING EFFORT DISTRIBUTIONS
20. City of Sydney
Rose Bay
Lane Cove River
Manly
Sydney Institute of
Marine Science
22. predictors
0
1
2
3
4
prediction
occurrences
model number of presence points n and their location (yi). This has not
previously been proposed for the analysis of presence-only data, despite
the extensive literature on the analysis of presence-only data. We consider
inhomogeneous Poisson point process models [Cressie (1993); Diggle (2003)],
which make the following two assumptions:
1. The locations of the n point events (y1,...,yn) are independent.
2. The intensity at point yi [λ(yi), denoted as λi for convenience], the lim-
iting expected number of presences per unit area [Cressie (1993)], can
be modeled as a function of the k explanatory variables. We assume a
log-linear specification:
log(λi) = β0 +
k
j=1
xijβj,(2.1)
although note that the linearity assumption can be relaxed in the usual
way (e.g., using quadratic terms or splines). The parameters of the model
for the λi are stored in the vector β = (β0,β1,...,βk).
Note that the process being modeled here is locations where an organism has
been reported rather than locations where individuals of the organism occur.
Hence, the independence assumption would only be violated by interactions
between records of sightings rather than by interactions between individ-
ual organisms per se. The atlas data of Figure 1 consist of 721 A. costata
records accumulated over a period of 35 years in a region of 86,000 km2, so
model
explanation | correlation
MaxEnt
Boosting
GLM | GAM
Random Forrest