Combined Effects Of Temperature Research Articles

Intelligent planning of fire evacuation routes using an improved ant colony optimization algorithm

The evacuation routes on a conventional evacuation diagram are fixed as they do not consider the real-time impact of fire products on the routes in the event of a fire, thus probably resulting in an ineffective evacuation. To resolve this problem, this study proposes an improved ant colony optimization (IACO) algorithm to determine the optimal evacuation route in a supermarket building with unfavourable fire conditions under the combined effects of temperature and fire products. First, a simulation software (PyroSim) is used to simulate the real fire scenario with the real-time temperature, CO concentration, and smoke concentration at each location, obtained from monitors. The heuristic function and pheromone update strategy of the basic ACO are improved based on the monitoring data. Next, the optimal path planning is achieved by using the IACO while considering fire products. Compared with the paths planned by the basic ACO and a commercial software (Pathfinder), the path planned by the IACO can effectively avoid areas with harsh fire environments and reducing casualties due to failed evacuation routes caused by changes in the fire environment. Finally, based on the IACO, a visualized evacuation guidance system is developed to demonstrate the optimal routes for users.

Metamagnetism and tricritical behavior in the Kondo lattice model

The phase diagram of the Kondo lattice model is explored around the ferromagnetic region, including an external magnetic field, and allowing the coexistence of ferromagnetism and Kondo effect ($\mathrm{FM}+\mathrm{K}$). Considering the combined effect of temperature and pressure, the evolution of the $\mathrm{FM}+\mathrm{K}$ phase yields a wing structure phase diagram with a tricritical point and a ferromagnetic quantum critical end point. The evolution of the spin-selective Kondo insulator phase, inside the coexistence region, introduces another critical end point. The results show a correspondence with the experimental phase diagram of heavy-fermion compounds, in particular, the ferromagnetic superconductor ${\mathrm{UGe}}_{2}$.

The Thermo-Mechanical Response of GeTe under Compression.

Thermoelectric generators (TEGs) are devices capable of transforming heat energy into electricity and vice versa. Although TEGs are known and have been in use for around five decades, they are implemented in only a limited range of applications, mainly extraterrestrial applications. This is due to their low technical readiness level (TRL) for widespread use, which is only at levels of 3–5 approaching laboratory prototypes. One of the most setbacks in reaching higher TRL is the lack of understanding of the mechanical and thermo-mechanical properties of TE materials. Out of ~105,000 entries about TE materials only ~100 entries deal with mechanical properties, while only 3 deal with thermo-mechanical properties. GeTe-based alloys with varying other elements, forming efficient p-type thermoelectric materials in the 200 ÷ 500 °C temperature range, have been intensively researched since the 1960s and have been successfully applied in practical TEGs. Yet, their temperature-dependent mechanical properties were never reported, preventing the fulfillment of their potential in a wide variety of practical applications. The combined effects of temperature and mechanical compression of GeTe were explored in the current research by implementing novel quantitative crystallographic methods to statistically describe dislocation activity and modification of the micro-texture as inflecting by the testing conditions. It is suggested, through utilizing these methods, that the combined effect of compression and temperature leads to the dissolving of twin boundaries, which increases dislocation mobility and results in a brittle-to-ductile transition at ~0.45 of the homologous temperature.

Novel models for simulating maize growth based on thermal time and photothermal units: Applications under various mulching practices

Maize (Zea mays L.) is one of the three major food crops and an important source of carbohydrates for maintaining food security around the world. Plant height (H), stem diameter (SD), leaf area index (LAI) and dry matter (DM) are important growth parameters that influence maize production. However, the combined effect of temperature and light on maize growth is rarely considered in crop growth models. Ten maize growth models based on the modified logistic growth equation (Mlog) and the Mitscherlich growth equation (Mit) were proposed to simulate the H, SD, LAI and DM of maize under different mulching practices based on experimental data from 2015–2018. Either the accumulative growing degree-days (AGDD), helio thermal units (HTU), photothermal units (PTU) or photoperiod thermal units (PPTU, first proposed here) was used as a single driving factor in the models; or AGDD was combined with either accumulative actual solar hours (ASS), accumulative photoperiod response (APR, first proposed here) or accumulative maximum possible sunshine hours (ADL) as the dual driving factors in the models. The model performances were evaluated using seven statistical indicators and a global performance index. The results showed that the three mulching practices significantly increased the maize growth rates and the maximum values of the growth curves compared with non-mulching. Among the four single factor-driven models, the overall performance of the MlogPTU Model was the best, followed by the MlogAGDD Model. The MlogPPTU Model was better than the MlogAGDD Model in simulating SD and LAI. Among the 10 models, the overall performance of the MlogAGDD–APR Model was the best, followed by the MlogAGDD–ASS Model. Specifically, the MlogAGDD–APR Model performed the best in simulating H and LAI, while the MlogAGDD–ADL and MlogAGDD–ASS models performed the best in simulating SD and DM, respectively. In conclusion, the modified logistic growth equations with AGDD and either APR, ASS or ADL as the dual driving factors outperformed the commonly used modified logistic growth model with AGDD as a single driving factor in simulating maize growth.

Combined effects of temperature and fishing mortality on the Barents Sea ecosystem stability

AbstractTemporal variability in abundance and composition of species in marine ecosystems results from a combination of internal processes, external drivers, and stochasticity. One way to explore the temporal variability in an ecosystem is through temporal stability, measured using the inverse of the coefficient of variation for biomass of single species. The effect of temperature and fisheries on the variability of the Barents Sea food web is still poorly understood. To address this question, we simulate the possible dynamics of Barents Sea food web under different temperature and fishery scenarios using a simple food‐web model (Non‐Deterministic Network Dynamic [NDND]). The NDND model, which is based on chance and necessity (CaN), defines the state space of the ecosystem using its structural constraints (necessity) and explores it stochastically (chance). The effects of temperature and fisheries on stability are explored both separately and combined. The simulation results suggest that increasing temperature has a negative effect on species biomass and increasing fisheries triggers compensatory dynamics of fish species. There is a major intra‐scenario variability in temporal stability, while individual scenarios of temperature and fisheries display a weak negative impact and no effect on stability, respectively. However, combined scenarios indicate that fisheries amplify the effects of temperature on stability, while increasing temperature leads to a shift from synergistic to antagonistic effects between these two drivers.

Modeling and influencing factor analysis for the temperature and damage dependent tensile strength of fiber/polymer composites

AbstractWith the rapid development of aerospace technology, the application of fiber/polymer composites in extreme environments especially at high temperature gets more and more extensive, the tensile properties of fiber/polymer composites in different temperatures environment have become a critical issue of concern. In this work, a temperature and damage dependent tensile strength (TDDTS) model for fiber/polymer composites was presented based on the force‐heat equivalence energy density principle and the damage failure analysis. The TDDTS model considers the combined effects of temperature, the evolution of constituents' properties and damage with temperature. Meanwhile, the TDDTS model has advantages from the aspects of prediction accuracy and convenience by comparison with our previous model and the Curtin's model. Further on, the influencing factors analysis of fiber/polymer composites concerning the tensile properties and damage evolution with temperature was conducted. This study offers a reliable model for predicting the TDDTS of fiber/polymer composites, and provides important insight for the strength degradation mechanism and the damage evolution.

Investigation of the effect of hydrodynamic cavitation treatment on the aging of tender coconut–palmyra wine

The effect of hydrodynamic cavitation (HC) on accelerated aging of tender coconut and palmyra blend wine was investigated at 3.45 bar pressure and 15–60 min of treatment (72 to 287 passes). The concentrations of phenolic (3.09 mgGAE/ml) and vitamin C (61.11 mg/100 ml) were maximum after 60 min treatment. However, as treatment time increased, the combined effect of temperature and pressure decreased antioxidant content while increasing the b* value. The overall acidity and pH did not vary significantly. As a result, a 15-min treatment at 3.45 bar pressure was the most effective. Particle size analysis demonstrated a drop in particle size (D50 549.7 to 246.5) following HC treatment, indicating that HC-treated wine had a greater influence on aging than standard wine. This research highlights the application of HC as a green technique for wine aging, which might be a game changer in beverage sector. Novelty impact statement Effect of hydrodynamic cavitation at 3.45 bar for 15–60 min for the aging of wine was studied Treatment had a synergistic effect on phenols and Vit C and an antagonistic effect on color and antioxidants FTIR showed that alterations in functional compounds with time during aging of sample wines were comparable to commercial wine.

Morphology and Influence of Abiotic Factors on Magnaporthe grisea

The present study entitled “Studies on Magnaporthe grisea incitant of blast disease of pearl millet [Pennisetum glaucum (L.) R. Br.]” was conducted during the kharif 2019 at research farm, Department of Plant Pathology, CCS Haryana Agricultural University, Hisar. Pearl millet blast disease is a devastating fungal disease causing considerable yield losses. Blast of pearl millet incited by Magnaporthe grisea is the most widespread and destructive disease of pearl millet in India and other pearl millet growing area of the world. This disease is a major factor limiting full exploitation of high yield potential hybrids in India. In the present investigation, culture medium plays an important role in growth and sporulation of fungus. Among 5 media tested, rice meal agar was found most effective for all the 3 isolates of pearl millet blast were tested. Combined effect of temperature and relative humidity also play an important role in growth and spore germination of fungus. Among five combination of temperature and relative humidity, 30℃ temperature with 100 % relative humidity was found most effective for spore germination.

Metal contamination and heat stress impair swimming behavior and acetylcholinesterase activity in embryo-larval stages of the Mediterranean mussel, Mytilus galloprovincialis

Behavioral parameters are increasingly considered sensitive and early bioindicators of toxicity in aquatic organisms. A video-tracking tool was specifically developed to monitor the swimming behaviour of D-larvae of the Mediterranean mussel, Mytilus galloprovincialis, in controlled laboratory conditions. Both maximum and average swimming speeds and trajectories were recorded. We then investigated the impact of copper and silver with or without a moderate rise of temperature on swimming behavior and acetylcholinesterase (AChE) activity of mussel D-larvae and the possible mechanistic link between both biological responses. Our results showed that copper and/or silver exposure, as well as temperature increase, disrupts the swimming behavior of mussel larvae which could compromise their dispersal and survival. In addition, the combined effect of temperature and metals significantly (p < 0.05) increased AChE activity in mussel larvae. Pearson's correlation analysis was performed and results showed that the AChE activity is positively correlated with maximum speeds (r = 0.71, p < 0.01). This study demonstrates the value of behavioral analyzes of aquatic invertebrates as a sensitive and integrate marker of the effects of stressors.

Isotopic characteristics and vapor sources of atmospheric precipitation in the loess region of North Shaanxi, China

To explore the hydrogen and oxygen stable isotopes and vapor sources of atmospheric precipitation in the loess region of north Shaanxi, we collected 107 samples of precipitation during 2018 to 2020 in the Dingbian County, Shaanxi Province. After measuring δ18O and δ2H of precipitation, we analyzed the isotopic characteristics and vapor sources of precipitation in different seasons. There was obvious seasonal variability in δ18O and δ2H, in that they were more depleted in the wet season (June-September) but more enriched in the dry season (April-May, October-November). In addition, the deuterium excess values were high in the dry season but low in the wet season. The local meteoric water line was regressed as δ2H=7.35δ18O+4.19 (R2=0.96, P<0.01) with slope and intercept lower than that of the global meteoric water line, indicating an impact of evaporation on isotope fractionation. There was temperature effect in the precipitation isotopes for the whole year and for the dry season, while the precipitation isotopes in the wet season were affected by the combined effects of temperature and rainfall amount. The HYSPLIT model showed that the dry season water vapor mainly came from the Atlantic Ocean and the polar Arctic Ocean, while the wet season vapor mainly came from the Indian Ocean and Pacific subject to the Westerly.

The effect of the presence of water on sulfur removal capacity during H2S removal from syngas using ZnO adsorbent

ABSTRACT Compared to extensive studies on affecting parameters in sulfur removal with ZnO adsorbents from coal gasification syngas, similar studies conducted for biomass gasification syngas (BGS) are quite rare. Thus, considering the BGSs with high water content, this study was performed to investigate the effect of H2O presence in syngas on sulfur removal capacity (SRC) of ZnO adsorbents. Initially, the effect of gas composition and temperature on SRC in binary gas mixture was investigated. While H2O decreased the SRC, as expected, the highest reduction in the capacity occurred in the CO–H2S gas mixture due to observed COS formation. Second, the SRCs and resulting COS formation were compared for synthetic syngas mixtures having different water contents and for different amounts of adsorbents. Finally, the separate and combined effects of temperature and H2O on SRC and COS formation in synthetic syngas were investigated by comparing SRCs of typical syngas under wet and dry conditions. The results showed that increasing the amount of adsorbent and temperature results in higher SRC due to a reduction in COS formation through the reactions of COS with H2 and H2O. This indicates that it is critical to control the residence time of syngas and temperature to reduce COS formation during ZnO adsorption.

Planktonic Growth and Biofilm Formation by Providencia rettgeri and Subsequent Effect of Tannic Acid Treatment under Food-Related Environmental Stress Conditions

Providencia rettgeri is an opportunistic foodborne pathogen with a strong biofilm-forming ability in low-nutrition environments. However, information regarding the impact of simulated food processing conditions on P. rettgeri planktonic growth and biofilm formation is limited. Using response surface methodology (RSM), the combined effects of temperature (19 to 37°C), pH (5 to 9), and sodium chloride (NaCl) concentration (0.50 to 2.0%, w/v) were applied to construct planktonic growth and biofilm formation models for P. rettgeri. For both RSM models, an increase in NaCl concentration restricted P. rettgeri growth. Planktonic growth and biofilm formation were maximum at 27.83 and 25.41°C, respectively. Tannic acid (TA) is a highly effective antibacterial agent that inhibited planktonic and biofilm P. rettgeri under optimal growth conditions. The viability of P. rettgeri cells was decreased by TA treatment, which caused destruction of the cell membrane and production of endogenous reactive oxygen species. TA significantly inactivated P. rettgeri biofilms, as verified by observation. The obtained models in this study may be useful for describing the impact of temperature, pH, and NaCl concentration on the growth by P. rettgeri in the food processing environment and better understanding the impacts of food-related conditions on bacterial planktonic growth and biofilm formation. These results obtained for P. rettgeri planktonic cells and biofilms can provide a framework for removal strategies for other foodborne pathogens.

Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: Combined effect of temperature and periodic cleaning

In this study, two lava stone biocarrier facilitated gravity-driven membrane (GDM) reactors were operated at ~8 °C and ~22 °C in parallel for treating primary wastewater effluent. Although the biocarrier reactor at 8 °C displayed less efficient removals of biodegradable organics than that at 22 °C, both GDM systems (without cleaning) showed comparable fouling resistance distribution patterns, accompanying with similar cake filtration constants and pore constriction constants by modelling simulation. Compared to the GDM at 8 °C, more foulants were accumulated on the GDM at 22 °C, but they presented similar soluble organics/inorganics contents and specific cake resistances. This indicated the cake layers at 22 °C may contain greater-sized foulants due to proliferation of both prokaryotes and eukaryotes, leading to a relatively less-porous nature. In the presence of periodic cleaning (at 50 °C), the cleaning effectiveness followed a sequence as ultrasonication-enhanced physical cleaning > two-phase flow cleaning > chemical-enhanced physical cleaning > physical cleaning, regardless of GDM operation temperature. However, significantly higher cake resistances were observed in the GDM system at 22 °C than those at 8 °C, because shear force tended to remove loosely-attached foulant layers and may compress the residual dense cake layer. The presence of periodic cleaning led to dissimilar dominant prokaryotic and eukaryotic communities in the cake layers as those without cleaning and in the lava stone biocarriers. Nevertheless, operation temperature did not influence GDM permeate quality, which met EU discharge standards.

Genesis of the Mianhuakeng uranium deposit, South China: Constraints from in-situ sulfur isotopes and trace elements of pyrite

The Mianhuakeng U deposit is the largest granite-type deposit in South China, ore bodies commonly occur in fault zones of Youdong and Changjiang geanites. However, the genesis and mineralization processes remain poorly understood. The main metal sulfide in this deposit is pyrite, which can be classified into four stages based on its mineral assemblages and textures: pre-ore stage (Py Ⅰ), early-syn-ore stage (Py Ⅱa), syn-ore stage (Py Ⅱb), and post-ore stage (Py Ⅲ). In this study, we present in-situ sulfur isotopic and trace element compositions of different stages of pyrite, obtained using laser ablation multi-collector inductively coupled plasma mass spectrometry (LA-(MC)-ICP-MS), to reveal the evolution of the ore-forming fluid and ore genesis. The δ34S values of pyrite ranged from −18.5‰ to −6.8‰, with peaks at −8‰ to −10‰, similar to the δ34S values of the host rock. The large range variations in δ34S values result from the mixing of ore-forming fluid and meteoric water. The U and W contents of all pyrite showed a strong positive linear relationship with their concentrations, indicating that the host granites were likely the main source of metal for U mineralization. From the pre-ore to the syn-ore stage, the contents of Co and Ni decreased, and those of Cu and As increased, while Ni/Se ratios decreased, suggesting that the temperature and oxygen fugacity of the ore-forming fluids decreased. There are significant vertical variations in δ34S values and trace element compositions of pyrite in the ore body of the Mianhuakeng deposit. From the bottom to the top, the oxygen fugacity and temperature of the ore-forming fluids increased and decreased, respectively. These results, combined with published data, suggest that the initial hydrothermal fluids likely originated from meteoric water and mixed with mantle-derived CO2 circulating within host granites and leached U and other metals (e.g., W) to form ore-forming fluids. As the temperature, oxygen fugacity, and pressure decreased, the hydrothermal solution outgassed and released CO2 while U6+ was reduced to U4+ and precipitated as pitchblende, resulting in U mineralization. Thus, the combined effect of temperature, pressure, and oxygen fugacity controlled U mineralization in the Mianhuakeng deposit. In particular, change in oxygen fugacity acted as an important factor affecting uranium mineralization.

Numerical evaluation of the coupled/uncoupled effectiveness of a fluid-solid-thermal multi-field model for a long-distance energy transmission pipeline

As the main component of energy transmission, long-distance energy transmission pipeline (LETP), whose safety problem is becoming more and more prominent with the development of the oil and gas transportation industry, is susceptible to the traffic loading, temperature loading, pressure loading and other loadings. In this paper, the mechanical characteristics of LETP under the interaction of temperature loading and pressure loading are investigated. Based on the theory of multi-field coupling, the mathematical model of fluid-solid-thermal coupling of fluid-filled pipelines under the combined effect of temperature and pressure loadings is established and verified. Meanwhile, an equivalent model is proposed to accurately calculate the stress of any pipeline segment in LETP. The results show that the coupling of temperature loading and the pressure loading is significantly affected by the end-side constraints of the pipelines. For strong end-side constraint, the coupling effect of temperature and pressure loadings has a significant effect on the calculated equivalent stress. The difference between the stress solution under coupling effect and decoupling effect is above 30 MPa. However, for weak end-side constraints, the error is within 10 MPa. The equivalent stress can be approximated by the decoupling solution instead of the coupling solution.

Two stressors are worse than one: combined heatwave and drought affect hydration state and glucocorticoid levels in a temperate ectotherm.

Heatwaves and droughts are becoming more intense and frequent with climate change. These extreme weather events often occur simultaneously and may alter organismal physiology, yet their combined impacts remain largely unknown. Here, we experimentally investigated physiological responses of a temperate ectotherm, the asp viper (Vipera aspis), to a simulated heatwave and drought. We applied a two-by-two factorial design by manipulating the daily temperature cycle (control versus heatwave) and the water availability (water available versus water deprived) over a month followed by exposure to standard thermal conditions with ad libitum access to water. Simulated heatwave and water deprivation additively increased mass loss, while water deprivation led to greater plasma osmolality (dehydration). Mass gain from drinking after the treatment period was higher in vipers from the heatwave and water-deprived group, suggesting that thirst was synergistically influenced by thermal and water constraints. Heatwave conditions and water deprivation also additively increased baseline corticosterone levels but did not influence basal metabolic rate and plasma markers of oxidative stress. Our results demonstrate that a short-term exposure to combined heatwave and drought can exacerbate physiological stress through additive effects, and interactively impact behavioral responses to dehydration. Considering combined effects of temperature and water availability is thus crucial to assess organismal responses to climate change.

Elevated temperature and low pH affect the development, reproduction, and feeding preference of the tropical cyclopoid copepod Oithona rigida

ABSTRACT The copepod genus Oithona is among the most abundant mesozooplankton in both eutrophic and oligotrophic waters. This paper reports the individual and combined effect of temperature and pH on the development, reproduction success, and feeding preference of the tropical species Oithona rigida. Experiments were conducted at different temperature (28, 30, 31, and 32°C) and pH (7.7, 7.9, and 8.1) conditions. Effects on vital rates were observed for different developmental stages and adult males. Sex ratio varied from near 1:1 at 28°C to almost entirely female at 32°C. Egg production and hatching success were maximum at 30°C and pH at 7.9. O. rigida preferred the motile green alga Dunaliella salina in terms of ingestion rate, feed selectivity, and egg production across all the temperature and pH conditions. Long-term studies are needed to validate the adaptability of this species to a variety of climate impacts.

Effect of temperature and humidity on the creep and aging behavior of adhesive joints under static loads

ABSTRACT To study the creep and aging behavior under the combined effect of temperature, humidity and static load, polyurethane adhesive was selected to make butt joints. The creep properties of the joint were analyzed experimentally under different static loads in hygrothermal environment. At the same time, an aging test under the combined effect of temperature, humidity and static load was carried out, and the variation law of the residual strength of the joint with the load and loading time was obtained. The complex fracture behavior of polyurethane adhesive joints was studied from macro to microscale. The results show that the hygrothermal environment had a significant effect on the creep properties of polyurethane adhesive joints. The creep strain rate of the joint was significantly higher, and the failure fracture time was shorter in the high temperature and humidity environment. When the temperature, humidity and static load were coupled, the joint failure strength decreased with time. With increasing load, the decline rate of the failure strength increased significantly. The interface failure of the joints and the hydrolysis reaction of the polyurethane adhesive were the main reasons for reducing the failure strength.

Cerambycid Beetle Communities in Caatinga Dry Forests Are Structured by Seasonal Species Turnover

Dry forests in the Caatinga biome of Brazil are seasonal ecosystems where diversity is driven by water availability. Understanding how the distribution of communities is driven by temporal climate changes has intrigued researchers for decades. However, temporal diversity patterns should be more evident in dry environments, since seasonality is characterized by being highly limiting to insect activities. Cerambycid beetles are considered good ecological indicators because they respond well to impacts of environmental changes. Thus, we asked two questions: (i) How do climatic changes affect the diversity of these insects across seasons? (ii) Are diversity components correlated with increasing air humidity, rainfall, and temperature? Our results showed a marked seasonality of cerambycid beetles, with higher abundance and richness in the wet season. The mean temperature and relative humidity were predictors of the composition of beetle assemblages. However, the variation of cerambycid assemblages between seasons is related mainly to species turnover. Our study demonstrates that the combined effect of temperature and humidity drives the temporal distribution of the cerambycids in dry forests. Although thermal sensitivity was low, the decrease in air moisture during the dry season was the limiting factor for these insects. Species turnover increased continuously with air moisture and temperature rise, creating temporal segregation among cerambycid species and maintaining the stability of the assemblage. Thus, our results are consistent with mechanisms invoking activity patterns, desiccation resistance, and physiologic constraints that predict a decrease in richness and abundance of the cerambycids from warmer and moister to colder and drier conditions.

Spatial bet hedging, thermal trade-offs and glyphosate: crickets integrate multivariate information during oviposition

Animals are increasingly exposed to thermal and chemical stressors across spatially heterogeneous landscapes, and adaptive reproductive decisions may mitigate the effects of multiple stressors. Yet, the combined effects of temperature and glyphosate (a broad-spectrum herbicide that is potentially the most commonly used pesticide worldwide) on maternal decision making and terrestrial embryos are unknown. Here, we integrate the effects of temperature, glyphosate (alone and in its commercial formulation, Roundup®) and spatial heterogeneity on oviposition (egg-laying) behaviour, which affects the fitness of females and their offspring. We used the variable field cricket, Gryllus lineaticeps , to test several hypotheses explaining oviposition site selection, specifically the roles of embryo survival, offspring phenotype and maternal survival in oviposition decisions. Temperature (but not glyphosate) affected oviposition and offspring success, with higher performance at intermediate temperatures and lower performance at the extremes, and oviposition increased with the availability of oviposition sites, particularly at warmer temperatures. Environmental context influenced support for oviposition site selection hypotheses. For example, spatial bet hedging (putatively related to maternal survival) was temperature sensitive and it modulated support for the ‘offspring phenotype’ and ‘embryo survival’ hypotheses. Specifically, an increased availability of oviposition sites prompted females to oviposit at warmer temperatures, thereby favouring offspring phenotype (increased developmental rate) at an expense to embryo survival (reduced hatching success). In summary, the interconnectedness of spatial and thermal heterogeneity (but not a common pesticide) played large roles in decision making that affects transgenerational fitness. • We tested hypotheses for oviposition (egg laying) site selection in G. lineaticeps. • We examined effects of temperature, glyphosate and spatial heterogeneity. • More numerous and warmer sites favoured developmental rate, not embryo survival. • Temperature influenced spatial bet hedging during egg laying. • Regardless of temperature, glyphosate did not affect egg laying or embryos.